Hello ? ( could you please amend your name to its actual - if not possible, please let us know and we will arrange for Admin. to do it for us).
Anyway, this is likely to sound pessimistic and dismissive, but I really don’t think anyone on here can be expected to diagnose the cause of your current issue, without access to the vehicle.
If this were mine, I would be returning to the dealer who carried out the work, without delay, and getting them to re-examine it.
Did you settle the (expensive?) bill by debit or credit card.
Kind regards,
Gareth.