Unhappy client

I have a funeral policy with 21st Century. Month end of March or first week of April I called them and complained that they are doing a debit on my account and that was not our agreement and to my surprise they gave me a different amount from what they were suppose to deduct and we agreed that was not my fault. I gave them a new account number to debit from because their late debit was an inconvenience for me and they agreed. In the month May a late debit appeared on my account and that made me angry but I left it as it is. This month the is no transaction made from both my accounts. I send the message on their Facebook page and all they are intrested in is to give you a qoute cauz a consultant called and I explained the matter and she transferred me to their customer care department were by their phones rang without any response. Today again I tried calling them and it rings without response. My concern is that should my policy lapse due to their negligence they will take all the responsibility and I am not going to be billed twice for their faults. I need them to call me asap on ***