Product: Debt collection

A previous landlord sent my name and information to a collection agency without notifying me first. They did have my phone number. They also talked to my landlord which where I reside at now for there references pertaining to me. Which its evident they were good references I got the apartment. They did not send me anything in writing about a bill I supposedly owed them. After my 1 year was up I was told over the phone that I was on a month to month lease. I did not sign another lease for another year. I recently found out that my name was sent to ProCollect ( collections ) Agency. Its been 1 year and 8 months since I moved from this apartment. Im just now finding this out XX/XX/XXXX. I find this out through the credit bureau. I was shocked, upset and etcs. I have good credit and I try to keep it that way. I dont understand how Pro Collect can send my information to the credit bureau without notifying me first. They didnt send me a dispute letter or nothing. There very rude and threaten me if they dont have there money by XX/XX/XXXX there going to send my information again to collections. I tried to tell them that the bill is fraud over the phone when I found out this lie. There billing me for the month of XX/XX/XXXX. I moved out of the apartment the middle of XX/XX/XXXX & yes I paid the full month XXXX bill. There coming after me for the whole month of XX/XX/XXXX, garage parking billing me. I paid rent in the resident Im in now in XX/XX/XXXX. There charging me {$58.00} for the month of XX/XX/XXXX for garage parking when my rent wasnt but XXXX XXXX monthly. They created a bill for XX/XX/XXXX for braking a lease I never signed. I was on a month to month lease. I feel the reason they didnt contact me by no means is due to they know I would of fought these accusations in court and I would of won. This is fraudulent activities. I always paid my rent and still do. I need for this issue to be resolved. Times are hard with this COVID 19. I dont need my credit score to go down due to there fraudulent activities. This bill is for {$1300.00}. I get a letter from Pro Collect telling me if I dont pay them that this can stay on my credit report for 7 yrs among other things. I wont be able to get additional credit. It will effect my employment. I wont be able to purchase a home or car, or even Qualify for an apartment rental. 
I tried telling them this is fraud because all that was reported are lies. They are liars and scandalous. I had major problems living there with them coming in & out of my apartment without my permission. Theyve stolen items out of my apartment. There were bed bugs in my apartment. They were keying up my car ( XXXX ) in there garage without cameras. 
I had to remove myself from there. I assume they thought I was stuck there for there torture. 
Now 18 months later I find out thru collections there fraudulent billing me for things when I no longer lived there. I got proof I paid my landlord where I reside at now that I paid them XX/XX/XXXX my first month rent. The other accusations are lies too. They created this buill out of jealousy and envious of my well being. I am an honorable XXXX service connected veteran. I dont have the free monies to give them for there needs. 
Please in Gods name help me get rid of these snakes!!!