Best Heating Cooling Units Installed in Milwaukee WI

Had service completed last month for my boiler. Of course it wasn’t cold enough to turn on heat, but now that it’s needed it keeps flipping into an error code and having to be reset daily. I called and spoke to one lady who said a tune up was 150, but when I mentioned that it had just been serviced they said there would still be a tech service charge of 89.95, then 75 every hour. I asked do you all not guarantee your work. I was put on hold for her to find out if they guarantee their work. She comes back and says she can send a tech out, but if the issues is not due to the recent service then I would have to pay the fees. Now how would I know whether or not they would tell me the truth if it was their mess up? Also, they tried to tell me there was no record of service last month but only the previous year! So add poor record keeping on top of it. No thanks!