I've got some problem with store who fixed my Mac. I don't know if the store under AASP or not but I hope it is related.

To cut it short;
My iMac is a vintage unit.
Middle year 2016: Give to them to fix my GPU (busted due to overheat).
End of year 2017: GPU got broke again. Give to another store to fix, and that store told me that GPU is not that clean (refer to attachment, the yellowish thing). Masking tape bersepah.

Is it standard thing to repair GPU ended with this condition as a final product?
If no, is anyone else got the problem with the same store.
Formerly the store name is IT Computer Solution, UIA (Gombak) branch. Now they are known as Mecnote Studio (or some document said Macnote Studio. I think this guy had identity crisis).

They don't want to be responsible as they said to me; "Your warranty is out of date", "You agreed with our term of services" (which supposedly include with good quality), "The tape on GPU is a normal practice for computer store".

Thanks for helping me.

* Note that I had report KPDNKK, not yet TTP (lack of support). But KPDNKK let them go as they didn't find any mistake on the day that they got spotchecked.