Double Premium and No Refund

We got married and combined my policy with my wife's policy in April. We went through an hour long conversation to get everything sorted out and moved over. We were promised a refund for her premium and my premium was added to pro-rata. We are still waiting for this refund and to make things worse this month another full debit order went through for my wife's policy as according to the call center they have no record of her policy being changed. Thus we paid a double premium for the same vehicles on both policies yet again. I have been on the line with the call center every day, where I just get a promise of a call back and this never happens. Will be looking elsewhere for cover from now on.