BAD_BAD SERVICE

I order 17 days ago the Tom Cat Tab from Groupon. I phoned them at ***, they said the price of tab is R199.00 and I paid R200.00 the payment was decline because I paid R1.00 to much. Why couldn't they let me know there is a problem. My friend oder the day before me and they told her it is out of stock \HOW CAN THEY LET PEOPLE STILL ORDER IF THERE IS NO STOCK\"WEEK AFTER WE ORDERD THE SHOWED AGAIN THERE IS A TOM CAT TAB FOR SALE FOR R150-00. HOW DO THEY DO IT TO CARRY ON LIKE THIS THE ADVERTI*****T BOARD MUST STOP THEM TO SELL ANY PRODUCTS ANYMORE."