Attempts to collect debt not owed: Debt collection

The original creditor attempting to collect the debt did not provide me access to my account to make the payment within the time frame allotted before submitting the amount to collections. I attempted submitting payment prior to the final date provided before they submitted the amount to collections, and I was no longer able to access the payment portal to make the payment. I reached out to support over email and did not receive a response until well after the time frame to make the payment had passed, and no support was provided other than being told the amount had already been submitted to collections. This company also then never returned my security deposit, which exceeded the amount that is being reported as owed. The apartment was left in clean condition with no physical damages, so there was no reason to have not received the deposit back.