Did they take a pic of the phone BEFORE the repair?? If at a actual APPLE store they usually do for this exact reason .. I would escalate this issue

No there are no hidden costs..I was surprised at the price actually being reasonable myself lol… I just got a battery replacement that was at 71% about a month ago .. They even replaced the batt with my glass back being cracked to hell and didn’t try to sell me a new back or anything

Cost to replace a battery in a iPhone 11 at an Apple store with a genuine Apple batt was $69 .. don’t know how much you’re paying to replace with a aftermarket batt but im sure by now you would’ve paid less by just replacing with a Genuine Apple battery.. Not to mention you get a 1 year warranty with Apple 🤷