As WR has said. It depends on what you're not happy with.
If it was a Low Cost Model and it's having problems editing pictures, you have made a mistake. There is nothing wrong with it, that's not what it was designed to do.
Again, if it only has 16/32GB Storage, which M$ Office will consume a goodly chunk of,the problem is really yours. You bought something with a Specification below your requirements.
It is possible that they would take it back for a full refund, but that is unlikely as its value will have dropped because of your use of it.
However, you may be able to negotiate an exchange for a more powerful model. Much will depend on how you paid for it and you will be at their mercy.
Sorry for the bad news