Begging for debit order mandate!!!!!!!

I signed a debit check mandate 2 months ago and to date every month I am forced to make payment into Icebolethu account. I waited for the debit order to run on the 25th of October- it didn’t. I then sent a WhatsApp message (and this wasn’t the first one, I had sent a message to query this issue in September as well). The person who didnt even bother to introduce themself by name then had the audacity to tell me as a client to REMIND them the following day to call me so they can check what the issue is. I was flabbergasted and asked how they expect me as a paying client to make contact with them!!! The service I have experienced has been appalling and disgusting. My question is if they can treat me like this now, God forbid I have a burial how will they service me as their client. I am not a happy client and if my money is not good enough to have a policy let me know so I can find a company that will value me as a client and give me good service!