i have a question and hoping you can help me.

i have been experiencing UTI infection for the last couple of weeks can be a month or more.
they gave me antibiotics(purbac) and miss-spot and pain relieving tablets(prolief)... i have completed the dosages as prescribed and fine myself back with having uti... i do have a record of over 3 years of experience with uti. I am allergic to penicillin

can you advise on this.