Disgusting Service from Rain unallocated payment to my account

I have received a disgusting service from Rain regarding my billing, my account still shows overdue even after I have provided POP to rain nothing is being done to resolve this crisis. Every time I receive a reminder message that my PTP is overdue and I make a telephone follow up with them the call gets answered by someone in Asian country and promise to escalate the matter to the billing. I spoke to Nobuhle Ngidi *** from Rain and provided her with POP and she doesn't bother to resolve this mess. I am going to cancel my subscription with Rain if this overdue account is not resolved ASAP