lying

i have paid my amount for Lancet Laboratories 2 October and Sent the proof of Payment to all i have to sent - then They Calling me every ****ing Day. they head is ****ing crazy - now they sent me SMS i have to Pay more R 350.62..- I WILLL NOT pay for this becuase they *****ing your money and lying to you - soooooooo stop calling me - its really bad bad bad bad services