"Kidney stones"

I have been to basildon hospital 7 weeks ago, had a scan and realise i have kidney stones. I had a stent put in the left side. I've been told after 4 weeks i'll be asked to go back and have a laser treatment but nothing happened. After this 4 weeks i went back with bad kidney pain and just been trated for infection and told to wait again to receive a letter for a laser treatment appointment and again nothing, i'm in lot of pain, and every time i go A&E the waiting time is really long 5-6 hours