Poor communication

I joined Cool Ideas in February 2020 just before lock down. I did not receive any invoices for about 2 months. I then send a query asking why am I not getting billed. I got a ticket for that but no response. In July I decided to send them a mail to say I wish to cancel due to the lack of any response and the anxiety. Still I only received a ticket and later an email to send it to their cancellation mail. I then all of the sudden received an invoice for a completely different account. I again asked what is going on and no response. Then end of last month I got a mail to state I owe over R2000 for a service I didn't use. I query this and now they wish to work out some sort of debit plan. This is unacceptable for me.