It didn't work at all - there is absolutely no difference

i paid $1500 for 2 Sculptra treatments on my arms at spa trouve in st. george. it didn't work at all. it has been about 6 or 7 months since my first treatment and there is absolutely no difference. i was shown before and after pics. there was no apology or cpmment about how it didn't work. at least it doesn't look worse.