Tried to cancel contract since 14th of September but no luck after 2 months!

MTN is ignoring my request to cancel my contract. I have moved to the Netherlands in Dec 2019, but could not cancel my MTN contract as the end date was on 13 September 2020. So for 9 months I paid the contract without using it at all. On the 14th of September I contacted MTN customer service via e-mail to cancel my contract and put the number on Pay as you Go. I first tried to call from the Netherlands but wasn't able to get through, so I mailed. I did not get any feedback until the 4th of October after I escalated with MTN on Twitter and eventually got feedback from Retentions on the 23rd of October! They then said I was in arrears. This was because I reversed the debit order that went of end of September, since it was still a full month and I had no feedback on whether it was canceled or not. Here's my reference numbers with MTN ***, ***, *** and ***. All I want is for MTN to tell me exactly what I owe pro-rata up to the 13th of September (or 14th when I send the mail to cancel) so that I can pay that and the contract can be ended.