Vespa — service issue in vespa s 125

I have a vespa S 125. Got my bike serviced from shree Krishna agencies, Vadodara. Even after sending my bike twice in two months the problem is not ressolved. Workshop is 70kms run from my place. Now every time they are just asking to send the vehicle to them for servicing and they assure me that the problem will be solved but again it is the same. Have complained to vespa with complain no. 109039 but the problem is not resolved yet. Bill is not provided by the workshop after servicing. They said they will mail me but no mail received from them.
Even no proper response from Vespa's end.
I want them to come to my place and resolve my vehicle's problem.