Air Conditioning Unit/Lack of Communication

I recently purchased AMS.  I was told the month prior to purchasing that they would repair anything.  I asked the representatives several times when my contract begins if I could put in a claim.  The answer each time was yes.  I put in a claim, a company came out to check our air conditioning unit for about 2 minutes and left abruptly without giving me any solid info and not giving me anything in writing (but they got their 100.00). I called AMS to get some updates on our unit.  I waited over 45 minutes on the phone the first time.  The second time over 35 minutes and the second time over 25 minutes. Still I did not receive any info from AMS.  I finally spoke with a manager Rob and I told him I no longer want to be a part of AMS and I would like to discontinue my contract with AMS.  I also received a phone call today stating AHS will not repair our air unit because they "claim" it was an existing problem.  Not satisfied at all with this company!!!!!