Very disappointed in the level of incompetence

I'm very disappointed in the service that I received at edgars. I have phoned edgars collection centre, emailed them multiple times. I paid my account on the 23rd of September 2020. Been receiving endless texts informing me that my payment does not reflect on the system. Sent them my information, Acc no. And proof of payment on the 23rd of October 2020. Till today I'm still sitting with this problem. Their level of incompetence is appalling to say the least.