Double debit after numerous attempts to fix this

I took out a policy in June with Clientele and made It clear that my debit date should be the 1st of every month or the last day of every month. My first debit was on the 25th of June. I called to have it rectified. Then in July the same thing happens and I get ****ed because it is meant to be rectified. In August the same thing happens and now I am at my wits ends with the level of incompetence in that call center. I call to get my refund I am told by Rebecca that they will process my refund and debit in the correct date. That didn't't happen, then I get debited again on the 1st of September. That means two freaken debits in the same month. If the staff brilliant *********** on their basics functions, them I am scared to imagine the lawyers. I don't want a call from an agent I want someone senior. Don't even let your service recovery specialist call me please, I demand all my premiums I have ever paid in full refunded to me and that useless policy be cancelled