MEMBERSHIP SUSPENDED

I asked *** and I called ***in May, June and now in July, asking them to change my debit date from 25 to 1 of every month. My medical insurance was suspended twice for failed debit order payments. The bank is charging me money for each failed debit payment. Same happened yesterday, I called again this morning, asking for the same thing. So it will be suspended again????. Come on guys, kanti what is the point of people calling and sending emails if they can't be assisted? On top of that I am unable to take my child to the doctor when the service is suspended, and I have to pay my bank extra for failed debit orders. This is poor customer services. What must I do to get the assistance that I need, or what must I do to be taken seriously?????? Please advise urgently