The make and model or the manufacturer label information is needed from you. We are basically guessing at this point. Help us help you. There is no one answer to your query.
Is this an equipment dealer purchased mower or a "big box store" purchased unit? (Lowe's, Home Depot, Tractor Supply Co. etc.)
When I worked as a Service manager for a JD dealer, we occasionally received new riders with bent deck housings from mishandling when loaded on the shipping platform crates at the factory. Many had to have the deck shell replaced.
This issue needs to be properly addressed with the salesman who sold you the unit if it was at a dealer. Or it needs to be addressed by the repair shop Service Manager. They need to own this problem and not play "kick the can" with it.
They need to pick it up and take it to the repair shop, actually mow with it and figure out the problem(s) Sending a mobile repair person is usually no good in this situation and just cost you more money.
