Very disappointing company

Very disappointing company
This company fitted me large patio windows when they wouldn't slide properly I asked them to come back they did not they then contact me about fitting new windows I asked them to come and look at the patio windows and also to give me a quote for the two new windows they said they would they promised to ring me and make an appointment several times at last they called me and said they couldn't get in touch with me two phone numbers and an answer machine so Why?haven't put my thoughts to them that I thought they were very disappointing company I had the phone put down on me
My advise would be to try a more reliable company that stick to what they say !!