Poor service and possible ***** with false adverti

On 22 April 2015 I bought a 2TB external drive via Groupon.2 and a half weeks later I received a delivery from couriers and the product wasn't what I ordered and paid for. I received a 1TB external drive. On the same day I contacted Groupon to notify them. They stated they will sort this out and will send me the correct product.A couple of days later the same courier company collected the wrong product from me. On 12 May I requested an update and received feedback from Evander (Groupon Customer Support - EMEA) telling me I have to wait another 5-7 working days! on 21 May I still did not receive anything and requested another update.Again, Evander responded via email this time saying that the couriers are trying to find the lost product and I will have an answer soon. On 27 May I contacted Groupon again and again Evander responded this time saying there was a huge mix up with the drives and they are just locating my purchased product and it will be dispatched to me. I have to just give them until end of the week of the 5th of June! Today is 10 June and although I tried to contact Groupon on 8 June with no response, I still don't have the product and want what I paid to be refunded