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We decided to try Abacus plumbing and air conditioning for our usual maintenance and repairs for Air conditioning. So far the technicians have turned out to be unprofessional, clumsy, and argumentative trying to get us to get a new ac unit when the problem can easily be fixed with a cheaper method. We joined this company paying them an annual fee for tune ups. Not to be sold for a new ac when the unit is functioning quite efficiently. On Jun 12, we needed a part to make the AC work. We needed a capacitor to fix our problem when the AC stopped working. The technician tried to tell us we needed a new AC and when my husband suggested he look at the capacitor as the culprit. He said Oh it's the capacitor. They changed the part.Two months later was our scheduled tune up.With our annual fee We are supposed to get tune ups to ensure things continue to run smoothly. We scheduled our tune up the day we signed up back in June and received NO appointment reminder till 30 minutes before the technician arrived on August 10, 2022 (yesterday). We received no reminder for this appointment till 30 minutes before the technician arrived, while most professional businesses give you a 24 hour notice and reminder in case something comes up.We had the worst display of professionalism, work ethic, and customer service by the AC technician named John V. He came to our house for an AC tune up to keep our system healthy and we has no issues with our system until he put his hands on it. He left our backyard gate open and attic open when he left and mishandled the parts in the attic causing it to not function properly and we're suddenly without air conditioning when he left till today when we had to waste more time with a separate appointment and technician. He displayed a lack of professionalism and argued with us. We ended telling him he needed to leave our property. We have received NO formal apology about their technicians behavior. We are questioning whether we want to continue as a customer. We have had many companies from different service departments visit my home and have never experienced this kind of unprofessionalism. We do NOT recommend anyone using Abacus plumbing and AC as their technicians treat customers rudely and with lack of professionalism and always recommend a new AC unit to up their sales when our unit is functioning just fine. Our time was greatly wasted with this tune up where the technician messed up our system as validated by the technician that came today.