Product: Checking or savings account

This is a follow up for my previous complaint. Im adding more details this time. The bank sent me a text message asking me if I purchased something for the amount of {$3300.00} on XX/XX/19 and I immediately said no ( I was sleeping at that time- the message woke me up ). I called Chase bank to report that transaction as unauthorized and to ask them to send me a new card since I was afraid that my information was being compromised. I opened a case for them to investigate because I was not the one that made that purchase. That day, hours later I saw an email thanking me for purchasing a computer on XXXX and I immediately sent a couple messages to the seller ( 4 messages ), asking that person to please cancel the order and explaining that it was not me- that someone hacked into my account or something. The person never answered back, and instead provided XXXX with a tracking # and shipped the computer. A few days later, I received an empty package with the tracking # they provided to XXXX, I immediately called the police department and the officers saw the empty/small Package. I even recorded a video of myself obtaining the package from the mailbox and opening it. What was really strange is that the package needed a signature, however I was not home at XXXX ( the time it arrived ) and nobody was, but when I requested the proof of delivery on usps- I found out that a person called XXXX XXXX signed for it ( nobody here with that name ) and its not even a regular signature. On top of that, the address that person wrote is XXXX, not XXXX which is mine. Also, the package was empty and small, not XXXX like stated. Anyways, I filled up a police report and talked to the detective the day after, they told me that the only thing they could do was asked XXXX for an XXXX address and it could take up to 3 months. I sent the police report and screenshots of the video to Chase, I could not sent them the video because they only receive documents through fax. A few days ago, I received a letter from Chase telling me that they were closing the investigation and they found that it was authorized. I could not believe it. They told me that the police report was not proof of anything. What about the screenshots of the conversations and the empty package? They did not answer to that. I asked them to sent me what they found, and they sent me the tracking number. I had the tracking number from the beginning and I do not understand how could that prove that I made that purchase??? I did not and I reported it right away. I asked them to re-opened the case and three days later they told me that I had to ask the seller for my money back, not them. However, that was a debit card account, my money, and the seller scammed me. I also read online that its not the first time swing computers does something like this, a lot of people have complaints similar to mine- that person is aparently really good with computers too. That money was for my tuition and I thought that it was going to be safe or that I was going to obtain it back since it was a fraudulent purchase that I did not make, but that was not the case. I have called Chase Bank almost every 3 days since that happened, and they never find a solution for me, instead they ignore me even thought I have valid proof of what I am saying.