Warranty claim and false information

I introduce my myself as a loyal Vodacom customer whom has never had any problems with Vodacom up until now. I recently upgraded my contract to a Samsung Galaxy S6 and the day I signed the contract a asked in store to please help me with the ADH app for warranty purposes. I asked the gentleman who helped me is it still the same as it was previously with all the other Samsung phones. He said to me NO its not the same the only difference with the Galaxy S6 is that you now only have one year ADH warranty which includes either one screen claim or one water damage. I asked him are you sure its for either one of the two and why is it now only one year? He said to he has no idea but he can assure me its defiantly either one water damage or one screen damage claim you can do as long as it is within one year after that its my own problem which I understand. The day I phoned and asked them to check the job number on the repair for me then only they said to me there is no ADH warranty claim and they admitted to me that they themselves did not know that ADH does not cover water damage on the S6. Please help i just feel it was their mistake and they should see to it and fix it