Incorrect Charges from Lancet

I have had the worst experience with lancet. Last year May i had bloods done through a gynecologist i had been to. Just over a month later lancet sent me a bill for R2031.90. When i queried it with medical aid, they asked me to send through the statement and proceeded to forward me a payment advice which i then sent to lancet. There after Lancet sent me a bill for R1749. I proceeded to send them payment advices that i had received for discovery. Discovery also advised me that Lancet had changed my rates and i should not worry, send lancet my payment advise as they have agreed rates. A whole year later they handed me over to debt collectors, which is a poor rating in my credit as it seems i do not pay. I then sent through my statement and payment advices to the debt collectors as well as to lancet again. Only to have my bill reduced to R351.60. On the bill you can clearly see i was charged the incorrect amounts, that were credited and amended to the correct amounts. Should i not queried it and paid it lancet would have received payment from medical aid and myself. How many other people does this happen to and there is no apology, neither from Lancet or the debt collectors for incorrect information. This is really unacceptable and deformation of character.