MoreVent Heating Cooling Plumbing

My heat pump stopped working and I called them. They charged me $500 to do a diagnostic and put coolant when they should not have. Then they tried to sell me a new system for $13,000 or change a coil for $6,000. Apparently others people have experienced the same. I called someone else who did the repair for $900. After I complained to Morevent and asked for my money back they assured me that they were right. The sale pitch was very pushy and as soon as I accused them of up selling they became very aggressive and defensive. Stay away from them at all costs. I had 2 other companies come and none told us to replace the coil or buy a new system. BTW my heat pump is only 14 months old.