Customer Negligence

I regret ever signing up for a contract with MTN . The have the poorest service and fail to resolve customer queries . There was a time in February where my payment skipped because I got paid a day later . Before my account even went on arrears I transferred money from my app . They keep on saying they are unable to allocate my payment and I have went an extra mile by providing my bank statement as proof . I went to their outlet in Hyde Park more than three times since they kept blocking my line from making calls . I've been calling their call centre as if I have nothing to do . I have sent emails and following up with one issue for 3 months and last month I was double debited where in I did not owe them anything . I have been making follow ups until today because the extra R516 that they took is a lot of money and I'm inconvenienced . Their whole team is *********** . Both call centre and that stupid outlet . The outlet didn't make an effort that is why I stopped going to the store . I just called and asked to speak to the manager gladly he is willing to assist and I hope I will get feedback .