UTI since 1 year. Please help me.

I am suffering from urine infection since last 1 year. I have pain in my kidneys. I have lost a lot of weight. I consulted many doctors, took antibiotics which are culture sensitive, even after taking those antibiotics it did not get cured. I got relief only for 2 or 3 days, then there is no effect of the medicines. I also consulted an ayurvedic doctor, banshil tablet, gokhshuradi gugglu, chandraprabha vati, punarnavasav shothari mandoor, Trinamool kwath, cystone forte tablet, sukshma triphala. I have taken all these medicines but even with these only. I got relief for 2-3 days, then there is no effect of the medicines. Now I have got an ultrasound done, in which a 3mm stone was found in the right lower pole of the kidney, everything else is normal. Please help me.