Sprint Verizon At&t empoyees

[molta]

quick question for the sprint folks.
i got my mogul replaced cause it was malfunctioning. the replacement got 3 white spots on it. got that replaced. the 2nd replacement's keyboard stopped working after 2 days. the 3rd replacement got a bright white spots on it.
sprint people have told me that HTC has declared that the white spots are cosmetic and do not hinder the phone's operability thus white spots are not reason for them to replace moguls. is that true? what can i do? I'm really frustrated now. every time i got to replace my contacts and address book and reinstall my progs.
what are my options?
thanks