Okay, So I will be telling my personal experience that I realised after buying a mobile phone, bracket, led bulbs, premium headphones, etc.
Well, I would say that If we are talking about shopping then Amazon is in the Best class as they give 100% return guarantee. I previously ordered a phone that was collpad note 3 plus but that got damaged only after 3 days of dilivery and that was my mistake, then I asked them to return it and the best part was they agreed for the return after getting to know that mistake was mine. They credited my balance into my wallet then I purchased second one and got delivered to my in a master of days. So thanks Amazon.