Debit order changed and billed for it!!

I'm EXTREMELY unhappy with the service of Miway since I signed up for insurance with them! From the start Miway just do whatever they feel like with my policy, change debit order dates, incorrectly bill me etc. Totally *********!! My debit order date was agreed on the 7th of each month, without my consent and knowledge Miway changed it to the 1st and because I was unaware of this, there was insufficient funds in the account and therefore it declined. Now Miway debited the monthly instalment PLUS a penalty because the monthly instalment rejected! Ey? How can Miway bill me for THEIR MISTAKE!!! Who gave them the right to even change the date in the 1st place plus bill me for their mistake?? That's *****!!<br> If the debit order went off on the 7th like it should've, then there would've been funds in the account!<br> I'm totally annoyed with this company that they can just cancel this policy and I'll take my business elsewhere!<br> I'm tired of your excuses! I want MY money back that your company STOLE from me!!