Pathetic service from cell c

I had a bad experience at cell c actual it’s still happening I have a contract with them for less than R200 a month but I always ended up paying around R600 or R700 when I asked them to show me in details my statement they failed to show me the calls or data usage for that month and they I have R500 and couple of rands that I paid and I was told I did not pay. They always block my line without even letting me know. At some point I was told I owe R150 penalty fee. During level one Lockdown I told them I’m no longer employed I won’t be having money on my account can they not debit my account so I can to EFT they refused and when I pay after the 25 I’m being penalized. Now I’m trying to cancel the contract they’re sending me from pillar to post. And they sent different statements in one month with no explanation