Black/swollen Eye from Botox That Didn't Work

small eye for ages afterwards, (the medical term i believe is ptosis) this only improved gradually after a few months & still feels smaller than it was. I informed them i wasn't happy & made a formal complaint, after a few emails all I was offered was some more botox in the future which as the treatment didn't even work & I don't live in the area isn't very helpful. I wouldn't go there again anyway. I have been to other aesthetic clinics for botox which ha always worked & no issues such as this.
I understand things sometimes may not work or may go wrong but it is how these things are dealt with after that is important in terms of customer service. Not a good experience or after care.