There is really no way find out whose tune you may or may not have. Sometimes you can identify if you have a tune by trying to set the cruise control at less than 30(?) mph.
Many generic or sub par tuners will also program out certain error or engine malfunction codes.
In my novice opinion...
Man, that has got to be super frustrating, after all is said and done and the "smoke clears" (😞 bad joke) hopefully they find that the error is simple and the fix is painless and permanent! Please let us know what the resolution is.