Fastrack — Fastrack watch, model no:68010SM07, terrible quality

Address:

City centre, mangalore

The underside plate of the watch is supposed to be stainless steel and should not get corroded. But how come mine is getting corroded few weeks after buying? You must look at this problem as soon as possible as this watch is right now not worth wearing. What's the point of paying so much if it gets corroded even when I never wore it once.