not debiting account

i was with momentum switched to mi-way car insurance, the debit order should have started 20/07/2015 still nothing has happened and there is money in the account i made about four calls spoke to your agents the last one told me debit order went through yesterday 29/07/2015 but still nothing has been deducted, as we speak my car is not insured. i think i must look for a new car insurance Mi way is not interested in my business