Miway triple debits up to date policy early!

Miway went into my bank account early three months ago (for a second time this year) and deducted monies not yet due to them - After complaining they promised not to do it again - well lo and behold, this month, not only did they go in again before the monies were due to them, but they triple debited one of our four vehicles that is ensured with them and perfectly up to date. This time they referred to it as a system problem, yet they insist that the customer must go through the inconvenience of having to produce a bank statement and submit it to them before they can effect a refund. Miway, once is a mistake, twice is bad service, three times is sheer incompetence. Time to change insurance companies, but not before writing to the Insurance Ombudsman and call for a full investigation into what I regard to be a blatant abuse of debit order facilities - No wonder authorities are clamping down. Please check your bank statements, companies should not be allowed to get away without penalty!!.