Dishonest and *******ion

I have never experienced such dishonest and *******ion service with Lancet Laboratories. For 4 or 5 months they've been sending me emails and sms with all different amounts that I have to pay. When I reply back by email to ask them to call me to explaining where all this different amounts on the different statements are from, they don't respond and if the do eventually respond after a month on email they still don't tell me where the different amounts are coming from. I eventually made a payment to them with the amount of R2759.34 and asked to to send me a statement and show me where that funds went, up till today no reply. Yesterday they send me a statement that now I have to pay over R6000. 00,last month the amount was about R10k, the month before was R3k. No one ever calls you back, they just send statements and and threaten legal action against me. They are a whole bunch of *******ive people with no morals.