New microwave does not work from day 1!   Installed.  Looks pretty but it is useless.   Does not work.   Light works.  Exhaust works.   But no heat - buttons do nothing.     Telephone person told us the problem was was a bad control panel.    Part ordered by her and delivered.   Repairman came and installed part- nothing happened.   At this point. He has ordered another part and is coming back to attempt to repair unit!    
To pay someone to uninstall unit , return it to the store, wait for one to get to store, and then pick it up, and pay someone to reinstall it - would be ridiculous.