MTN POOR SERVICE

I am utterly disappointed with the service I received from MTN, I have a contract with MTN and for some reason they never debit my account on time , I messaged MTN on Facebook numerous occasions, I contacted my bank to find out if the problem is with my Bank , which however my bank explained it is a fault on MTN, I get charged late fees and have been doing a cash Deposit as to not to have extra charges, however last month , MTN debited my account and still took late fee charges , which now is not my fault but a fault on MTN side , I contacted MTN and still the matter has not been resolved as I requested I would like to port to another network.How many MTN clients is being debited extra for MTN Negligence , on the 16th Nov 2021 I received a call from a agent , upon explaining the problem to her she put the phone down in my ear, again I notified MTN, and again they took my details but nothing had been resolved. MTN is taking extra debits for there Negligence and refuse to assist customers with proper customer service.