I am sorry you have had a bad experience with Xeomin. There are three FDA approved neuromodulaters in the US; Botox, Dysport and Xeomin. In extensive FDA trials, all three have been found to be safe (especially in cosmetic doses) and effective. Make sure that you are always going to a physician who specializes in aesthetic medicine for any of your injections.
Xeomin is an effective neuromodulator, approved by the FDA in the USA and HPB in Canada. It is used world wide and has the same safety profile as Botox and Dysport. Feel free to discuss these products with your dermatologist, but treatments are elective cosmetic procedures.