Product: Checking or savings account

Beginning end of XXXX XXXX I noticed I had been a victim of someone ( a foreign man ) hacked into my XXXX Account and had access to all my personal information, had my phone calls transferred to " him? '' When a call was made to my number, the voicemail stated a foreign man 's name, not mine. I was able to contact phone company and have issue fixed. 
I unfortunately than noticed my online banking had close to a zero balance. I immediately contacted M & T Bank to inform them, began a dispute. 
After filing the dispute I have been harassed, belittled, judged and absolutely categorized. XXXX M & T Bank employees XXXX and XXXX XXXX have made this a nightmare for me since XX/XX/year> to current. XXXX XXXX has ignored any to all of my requests. She no longer signs any email she will only put a department ( multiple departments ) This dispute was denied falsely, and they are simply ignoring me any way possible to let me explain my situation. They decided first to go with the Merchants Opinion/ Conclusion and during replying to Federal Resources the reasoning for the denial of dispute changed to the fact I had my debit card in my possession as I did inform them of that when I called to report this mistake/ fraud to bank. At the time I was extremely confused about what was happening to my account and my phone and email. 
I have reached out to all resources I have researched and I've been shunned by M & T Bank as XXXX XXXX stated that I can report to whoever and she can just simply write you/ them a letter. I was unaware that is how this worked and what rights do I have? Do I have to take this to court? 
I had been removed from bank/ online, they then changed their minds and never removed me from bank and opened my online banking back up soon after they picked my online account again giving me no access. I kept trying to contact " anyone '' cc my dispute status that I contacted the CEO and that turned out to be XXXX XXXX not the CEO and unfortunately this situation has went no where. All I've done and everyone I have reached out to, nothing happens except a bit of a cackle from XXXX XXXX ( not very kind to me ) she is making it impossible for me to contact anyone else within M & T Bank and I have gotten no where with outside resources? 
I thought this possibly was a inside bank fraud/ theft issue since I am not allowed to receive XXXX XXXX last name or dept or number and XXXX XXXX never responds but the few times she has she will not give her name or give me anyone 's name or number to contact, I never receive a response. 

Friendly suggestion : This Financial Institution in XXXXXXXX XXXX  really needs to be looked into, extremely bad reviews from actual persons that also have lost thousands at this bank and also receive No Information and are never contacted. They shut down your online account so you have absolutely no idea what is happening with your funds and to your surprise ( not so much now ) your funds are Gone and it is a extremely confusing, stressful process trying to recover your funds. 
There is a large group of people wanting to file a lawsuit against this bank. 
If you would like confirmation of others discussion based on this bank, I am more than happy to send you information as I have received permission from all the persons that have made complaints. 

Thank you XXXX XXXX XXXX