Terrible sales experience and being sent wrong item i paid for.

I purchased a Go Dex Label Printer online from there store. After being promised free delivery and being messed around by RTT couriers i had to call them back and arrange my own collection, when receiving the unit it was not the unit i ordered online. The unit I ordered was meant to have a setup LCD screen and have built in LAN. The unit i got had neither. The store then just threw there refund policy document at me , rather than offering to resolve the issue and send the correct unit to me expedited. They advised i needed to send the unit back before they would refund me. I dont trust this company or there sales practice after being sent something i did not buy. Terrible after sales service.