Complaint Review: GMAC Insurance

I called GMAC to get a quote for car insurance and the salesperson, Amanda told me several times throughout the phone call that the price she quoted was for a year and I repeated this back to her to confirm.  My sister was in the room heard the whole thing (I had the phone on speaker).  I even had her break it out for the exact price for each vehicle I was insuring and was also told that if I paid it in full for the year I would safe even more money, which I did.  Once I received the policy in the mail I noticed that it was for a 6-mo. period.  I immediately called them and was told that they would have to review our conservation from that day of 16 June.  I was told, after asking them, that if in fact Amanda told me that it was for a year they would have to honor that committment (yea right).  I was speaking w/a supervisor this time (Mitch) and he told me it would take 2-3 days to review the call and they would get back w/me.  Well they did not call me, I had to call them and was told they did not have an answer for me yet that it would take longer.  The lady told me she would put a rush on this request and call me Monday at 1030 to let me know the outcome.  Well once again, no call, I had to call them.  This went on for several days and then into a week or so trying to get an answer.  Well finally I was told that after reviewing the tape of that call, no where did Amanda mention that it was for a year.  I asked to hear that taping and never did get an answer.  I know that is a lie.  Their salespeople are rude, will not let you finish your sentences, talk over you, etc.  Well I started my search again and found cheaper insurance so called them back to cancell my policy and was told that I would have to pay a 10% penalty for cancelling prior to the end of my policy.  I asked them to show me that in writing of such and the form that I was shown states nothing about a penalty but does mention about your refund will be prorated based on the length you had.  That only makes sense which I fully understand.  If they do in fact charge me the 10% penalty I will take them to court because I looked on line and they can not do that unless it is in writing.   DO NOT USE THIS COMPANY FOR YOUR INSURANCE NEEDS.  THERE ARE CHEAPER AND MORE CUSTOMER FRIENDLY THAT GMAC.