Unexpected Quotation on ADH.

I have a Samsung Galaxy Not 3 SM-9005. My phone screen cracked about a week ago and i took it to Samsung Smart Care Centre in Roodeport under the Samsung ADH service. My phone qualifies for two screen damage repairs and this current incident is the second time i send it in for a screen change. <br> <br> 7 days later i get and unexpected quotation that my phones main-board is water damaged and also needs to be changed. my phone was completely fine and working well when i sent it in for a screen change. so now why is there a sudden \liquid damage"quote for a device which has never been anywhere near water or an form of liquid and a device which was fully functional when it was booked in for a screen change. The only thing which was damaged on my device was the cracked screen (which is covered by ADH) hence that was the only reason i went to a Smart care centre in the first place. i feel the technicians at that smart care centre have been careless with customer's devices and now they are shifting blame and not taking responsibility for their own actions. <br> <br> For brand which i have had over a decade of loyalty i feel cheated and disappointed. Samsung please follow up and give me a solution"""