Not great to deal with

I have been a paying customer for 7 years, never missed a payment. I recently changed bank accounts and made an error with the reference number. During the month I did receive communication that my account was outstanding and forwarded the proof of payment. Unfortunately no one contacted me to say that this proof of payment was not acceptable and I have since been block, meanwhile I made payment on the 26th February.

I understand all terms and conditions but It's not like a missed a payment and when I realised what had happened I did send the proof of payment with the correct reference. I am human, I make mistakes. There is no human compassion anymore