@sarmadraheem
mate, i am not sure which car you drive but if it is the one with Mevic, VVTI, VTI or EFI, etc. you should not be getting it tuned at all. just do the regular oil/filter change and way you go.
How ever if you have mod chips or after market ecu still once tuning is done its all good unless you constantly change the setting your self.
Just because a workshop has computerized equipment doesn't mean they have a fully qualified tech who knows how to use it too. 