I don't quite understand. You bought from a shop, but the shop says it's a Celcom set, so that means the shop is a Celcom authorized dealer/representative? So that means Celcom is directly responsible for this? If that's the case, then I wonder how many people they've already cheated. Not everyone is as keen as you to check the registration straight away. Good for you.

Answer: No, I wouldn't go to the same shop. In fact, with everyone looking to screw you in this great Kangkong-land, the only place I'd buy an iPhone in this country would be Apple's online store, and even then I'd double check my credit statement to make sure the bank hasn't screwed me over.