Incorrect debits

Cellc debits me 2832 on 31/01, nobody knows why bt ppl keep calling for the money, 3 agents promised to call back to provide a reason but know has called. Then again I have been debited incorrectly the end of Feb for more than 3000. Nobody is helping to resolve. Due to this my credit profile is being hugely effected and many other debit orders have bounced back, I have so much charges, I can't keep calling cellc and explainimg myself, the operation manager Mr Yunus Bayat tried to sort my complaint last year were my phone insurance was accidentally canceled by cellc and cellc, after investigation agreed to pay for repairs, so how that charge is coming on my account. My last resort is to escalate to icasa. I sick and tried of this, I'm a long standing client over 12 years and have numerous complaints, Nizaam ally