When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My suggestion would be to do some research on the shop you are currently using. A proper shop should have taken care of you better, unless you specifically directed them to only do the tune. Most shops would see this as an opportunity to make more money off of the additional fixes, hopefully not to the point where you're raked over the coals.