Poor after sales service - House & Home AND Defy

We purchased a Defy Double door Fridge/Freezer Unit during January 2018 from House & Home in Potchefstroom (Mooirivier Mall). Soon thereafter the fridge compartment lost gas & needed to be refilled. This was attended to by a Defy Technician, as required. During the third week of September 2018, the fridge compartment, again stopped functioning. The very same Defy technician attended to the problem and recommended that the unit be replaced (complete Defy double door fridge freezer unit)/exchanged by a complete NEW unit. However, after 3 weeks of complaining to House & Home & the technician, there has been no significant progress. The unit has still not been replaced /exchanged. We have therefore been struggling for the past 3 weeks without a proper fridge. This is totally unacceptable, since this Defy unit has been paid for in CASH & is still under guarantee. The current unit needs to be replaced/exchanged as a matter of urgency, bearing in mind that we are in the midst of the summer season. Should no replacement/exchange take place by/on 12 October 2018, we will be left with no other option but to take the matter further.