Best Backflow Prevention Assembly in Corpus Christi TX

Sorry to say I truly don't like leaving negative reviews however, I did not even attempt to utilize this company's service as I called to have someone come give an estimate or bid for work that needed to be done at my place and the guy who answered the phone was so rude and proceeded to hang up on me. Is this what businesses have come to- poor customer service right out the gate? They were recommended to me by a work associate. Needless to say, neither one of us will be using their services nor refer to anyone else.