Wrong Account Debited

Hi, I called in to MiWay insurance last week to add a new vehicle to my policy and I must say the service was absolutely phenomenal i even wrote a compliment about it but it seems like that was the biggest mistake because after that the ball was dropped tremendously, I asked for the 2nd vehicle to debited from a different account which was agreed on by both parties(myself and the insurer) I was called to be informed that I will lose the discount because of this which i was happy with and understood that that's how the business operates, I emailed Dorcus on Friday and yesterday to find out if my details have been updated and to find out how will the premiums for both vehicles be as I needed to cater for that but no one rep**** to my emails and nobody bothered to call me, I left it and thought all was well as per our agreement telephonically, to my surprise this morning i woke up and realized that premiums for both cars went off my 1 account, this is so annoying because I have other debit orders going off this account I need this resolved ASAP. I have been following this up to make sure this does not happen, i have been greatly inconvenienced and I am so DISAPPOINTED it's not funny.