Don't get too upset just yet.
I bought mine from Wally World for 119 bucks. Worse trigger I ever used.
The thing has quite a slap when she lets go also, noisy as a train wreck.
BUT. Once you master the awefull trigger, and find a pellet it likes it is accurate.
Mine prefers heavy .177 like the Crossman Premier H domed pellet and on a good day it will shoot 0.5" at 20 yards which isn't bad at all.
Lighter pellets scatter all over the place.
It's plenty powerful enough too. It will penetrate a steel can, both sides, easily, not an aluminum, but a steel 'tinned' can.
So for 90 bucks you did o.k. enough.
Would I buy another GAMO??
NO!
There are better airguns for only a bit more money, but you've got it and it will serve your purposes. Target plinking and small game shooting.
Have fun with it. If it breaks send it back. The worse that can happen is that they won't honor the warranty.
I have a lot of fun with mine back yard plinking and killing cans.