UNACCEPTABLE CUSTOMER SERVICE WITH REGARDS TO REPLACEMENT

In March 2018 I've bought an AIM mini oven from PnP Robertson. The oven has a 2 year warranty as stated on the box. The oven started giving sparks. I've returned it to PnP Robertson, who were just ******** about the situation, saying that they have problems with the supplier and still have problems from 2016 not sorted out (not even collected). They are not willing to replace the oven, and even asked me who is going to pay for the courier cost for replacement!!!!!!!! Up till today the oven has not even been sent away. For me as a customer PnP's customer services is TOTALLY unacceptable. I do not want to get involved in a retailer/suppliers relationship, that they must sort out themselves. Will not consider buying any electronic equipment from PNP again.