How does MTN survive with its sub-standard service! :-(

contacting MTN with a query is worse than any government department! we are asked to follow process but nothing come of it. we just have to keep following up and reminding them of your query. I cancelled my contract in 2020 because of poor service.....they then tried to debit me after i had cancelled and now that money reflects negatively on my credit score.....i have spent the last 20 days truing to get this sorted...i cant speak to anyone in the legal department.....we are only allowed to email them.....but our emails get ignored.......you can tell ive run out of ideas