Call avoidance at its worse

Good day

I have called cellc customer care department which the agent was not helpful at all after 25mins on the call ,I asked to speak to a TL. I was then transferred and the call was answered but silent .I dropped the call after waiting 01.15.43 . CALL AVOIDANCE AT ITS WORSE, im SHOCKED. Is it so hard to provide assistance to a customer that needs information on the cancellation process,simply query. The agent kept says your bank account is incorrect, I explained to her I was staff and given a 500 staff allowance.The account code was changed from staff to individual which i was advised on only after making manual payments to the wrong account number... I advised the agent iv been making manual payments after being retrenched. It cant be so difficult to provide a email address to send a cancellation letter. Well Iv sent it now to custserv,I hope someone attends to it. This is more than a month notice. Last payment on my top up will be invoice 01.05.2021 , note there will be no other payment then after. Hope this behavior don't happen to another customer.