We had bad wind for a while and the only thing that worked was a pretty unorthodox method of burping. We would put her belly on our shoulder and then rock her backwards over it. Firm hold all the time of course. It looks a bit strange but it worked. We tried Infacol and Infants friend and gripe water and none of it worked for us. We did the over the knee thing too when we were out in public cause it looks a bit awful hanging your baby over your shoulder.
Good luck and I hope you find something that works.