Aamco Transmisions Tranny NOT Fixed Fridley Minnesota

I am writing this on December 7 2015.Transmision in my 1994 Ford f-150 was shifting hard occasionally.I took it to Aamco in Fridley Minnesota to see if they could figure out what was wrong.They said the transmion needed to be rebuilt at a cost of $3000.oo.Two weeks later I got it back and it did the same as if it hadn't been fixed at all.I purchased an extended 3 yr. warranty.Since then I have had it in and out of there 13 times to get it fixed correctly.It was there for 6 weeks from June -July.I was told by Ray the manager that he was doing various tests on it and couldn't find anything.Then in August the Owner Brian Hiat got involved.Well now they are doing more testing and still nothing is fixed.I,m getting the run around from these people and feel I should take them to court.