I bought my car there in March 2009 they have done...

I bought my car there in March 2009 they have done all the service work on the car and all recall work. Took my car in for oil change and routine check on Dec. 4th. Was told we needed new tires so we bought Michelin tires from them and they put them on, day after Christmas the light came on indicating that we had low tire pressure stayed on all the way to beach and was off next day. With less than 2,000 miles on tires light comes back on and doesn't go off. My husband calls and talks to Robert Helm he said it would be 48.00 to check it out, because he had to pay his mechanic and 230.00 to replace the sensor. We talked to a well known tire dealership and they say they will replace it for 65.00 even though we didn't buy tires from them. I am very disappointed in the way we were treated.