Worse than dismal service

I had two accounts handed over to Easton Berry. One was been paid up about two to three months back and I have still not received a certificate of payment. The other was paid up last Friday, 10/12/2012, after receiving a call requesting the payment of the final garanteed amount on the 04/12/2021. I then received a call on Tuesday to say that there is an outstanding balance. Seeing as how ALL CALLS are recorded I requested they go back on the call I received on the 04/12/2021 giving me the garanteed last amount and phone me back. I have yet to receive a call back with regards to this and when I try to phone back the phone rings once then the line goes dead. I have received bad services in the past yet Easton Berry is by far the worse. I ask kindly that the issue of payment be sorted amd that I receive my certificate of payment ASAP.