What should I do on my cat?

my cat received injection of antibiotics and reduce the swelling for my cat in vet clinic because my cat face swelling so big.

I'm sad. in my area vet doctors are worst. they are rude and arrogant even harsh on sick animals. they make deal if we want to safe our pet, we need to pay extremely high.

I heard so many reviews , that they killed the pet and the same medicine, same brand in online shop only cost a few dollars.

I no longer trust on vets in any places.
What should I do on my cat?
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