Poor Quality Beds with Bad service

I purchased a bed sleepmasters Santiago from sleepmasters in Westgate Mall on 31 August 2020, within 2 months that beds springs was noisy & it's a 120kg per side per person. They arranged for an exchange which was done on the 4 November 2020. This very bed started having the same problem & to top it off a spring protruded as well which is making me sleep so uncomfortable. I called them on the 28 November 2020 regarding this, the store manager got back to me on the 2 December 2020 stating that she will do a refund then I can purchase another bed & add any difference. Up until today which is the 12 December 2020 I'm still waiting. I still have to sleep like **** which is so unfair. Their response to complaints is poor. They can never give a TAT. This is **** service to get from a well known bed supplier that supposedly specializes in beds selling many other brands as well as their own. I'm appalled by this **** service.