Business ProfileforMitel Networks

I purchased my business last December. At the time, the current owners and myself were under the impression that the phone contract had ended in 2018 and it was now month to month. I contacted Mitel and changed ownership. I was never informed there was a contract, nor did I sign anything agreeing to take on or start a new contract. I went to close the account yesterday. I was unable to speak with someone on the phone as it gives you no option to do so. I submitted a case and started a chat. The chat was disconnected and I ended up speaking with 3 representatives in order to get the account closure going. I was told I needed to give 45 days though the original contract signed by the old owners (sent to me by Mitel) states 30 days notice. I wanted the account closed 10/20/23. I was given email confirmation of this but received another email later stating closure date of 11/30/23. I contacted the collection employees cc'd on the email but was told they could not help and I needed to contact support again. I was told terms of service changed and it is 45 days notice and they also don't close accounts until the end of the month. I have tried the chat feature again but the representative stopped responding. Now when I try the chat it goes to transfer me to a representative but then boots me out of the chat to a window that allows me to rate the chat. I have no idea how to get ahold of anyone at this point to get this account closure figured out. I don't know what else to do.