Wrongful Billing

Had a pelvis scan made by mistake because the Hospital read my Dr's referral letter wrongly, Urologist From Life Carstenhof referred me for a penile sona at Life Fourways but a pelvis x-tray was made rather, and only after the Dr in charge made me aware that he did not read the letter correctly, was i asked to urinate the water they made me drink from the bladder so they can start with the sona. That was fine until i was billed for it and now i am taken to lawyers and have to pay a huge bill. I am willing to pay for the issue that took me to them not what they thought they had to do.