Cellc breach of contract and refusing to correct a fault

I took an upgrade contract with cellc n the start date was February 2019 the contract was a 15gb LTE worry 150.05 per month and the contract started 9 February 2019 so I was billed at the end of March which was pro-rata plus full bill and the bill was R196.71 for pro rata and R262.38 which is higher than the contractual amount I refused to pay this and asked them to correct t n they cut my lines cut communication to my phone couldn’t even call their call center . I used another phone call them again n launched a second complaint to fix this then they got back to me in 48 hours saying is fine is sorted then next day i called to find new amount do I make payment n nothing had changed still same problem didn’t have excess to my bank apps or emails or my family n just got involved in a car accident couldn’t even communicate with my family .so I was forced to pay even the over charged amount I call again the for the third complain they say it’s escalated to other departments all three of my complains still no solution even now Cell C is such a disappointment when I asked how do I cancel the contract the consultant ended the call in my ear . I called again to ask for the call recording of the day of the upgrade the consultant told me I don’t get it till the matter is resolved I asked when is it resolved she told me she doesn’t know . I used cell c since 2006 and trust me they showed my they are loyal to no one they are nonsense want to move to another network