Bad customer service

I don't know how cellc CONSULTANTS operate. My problems started in April when I had unpaid debits on 2 of my contracts .I then called and requested an immediate debit for both then requested change in debit order date going forward from May but it seems as though nobody listens as 1 was changed and not the other. So now I have to ensure that I check every month if they will do as requested but NO .It seems every time I call nobody attends to my requests but they are quick to charge me fees for their mistakes. I'm really disappointed as I have been a customer for many years with no problems until 2020. The previous months the problem was that the debit date was not changed despite calls that I have made to request the change were unnoted now they say they debited on the 25 ,why would they still debit on that date when I have asked for the change so many times.Im dealing with a query for additional fees due to their incompetence for the month of May and now June. I'm doing my part as an acc holder and cellc should also do the same this is tiring.......