Unprofessionalism and Poor service by MTN

I took out month to month data package whereby the data card did not work on my router. I returned card to store to let them know about it and they advised that I should also take the router.. I said no as I already had 2.. I want to cancel.. this was the very next day.. I did not use any data neither the card as it did not work. They confirmed that the would cancel contract and that I would be refunded for the card and any other expenses.. This was Oct 1 2021.. I got bills for October, November , December, January and they debited R439 from my account every month.. I called them in January to see why this has happened and the then requested for me to send a cancellation letter.. This , after an email was sent to cancellation dept on 1 October to cancel from store manager..This was eventually cancelled and I ended up paying until end of March.. I have sent several emails to various departments enquiring about my refund but thus far have not gotten any response.. ‘ only one that says it’s been cancelled which is not what I’m querying.. I have had several contracts with MTN over the past 15-20years and this is certainly the last straw.. bitterly disappointed with their unprofessionalism and poor Sevice.. I was a loyal , good paying customer.. C/ O Capitil Press