Poor customer service

Customer service it's poor and I avoiding to be handed to debt counselors or my account being In arrears. I have paid my account on the 20th June and sent proof to *** to my surprise today its a wrong email. I was wondering because I received reminder sms to pay my account before 30 June and I decided to pay again on the 26 June. Still when I check my account today no payment reflected. I decided to call the call center and that's when I was advised to send to a different email. I mean service people receive my email of proof of payment why can't they send to relevant emails. This will somehow lend us in bad credit record I am not happy at all