DAMAGED BED SET

I bought a bed set by Russells Volksrust on the 5th November 2013 and it was a cash sale. In September 2014 i went to the store and reported that the bed was sinking towards the middle and that it still fell under the guarantee period.. The lady named Tia was assisting me and she claimed to have logged the complaint with the Supplier and further claimed that the supplier had no stock. In February 2015 i was phoned by the supplier to assist with the complaint and i was told that there is a certain amount that i need to pay because the claim was reported after the guarantee period. I then phoned the store and spoke to the same lady that assisted me, i highlighted to her that I cant be paying a fee whereas i reported the claim within the guarantee period, she then said its fine i wont have to pay anything she will speak to the supplier. On the 24th April 2015 i went back to the store to find out what is happening with my claim and the lady responded that she will make a follow up with the supplier and that i must be patient since i don't want to pay the requested amount. It has been almost 7 months since i reported the bed set and i am not being assisted.