Worst Service & Billing Nightmare

My mom bought a fridge from Russells, Protea Glen. In less than a year the cooling was not working from late last year, the fridge became the heater. She reported in person at store, my husband and I went to the store to report it as well. In the process of all this all the perishable food that was in the fridge was spoiled as it was shortly after month-end. The store refused to take responsibility for spoiled food. My husband went in person to report at Russells Head Office in Braamfontein, you would think somebody was going to at least investigate and get back to us with feedback. He was attended there by an HR Manager who took even the copy of receipt from Pick n Pay as proof of all the rotten food items. No feedback from Head Office. We moved on with life and now, for the past 2 months they started sending my mom smses reporting unpaid account even though she pays her account on the last day of every month. She went to report this in store and it is still happening. The worst thing is that there is no proper system for reporting problems except for their useless call centre. My mom does not need all this frustration. This is the worst furniture shop I have ever had to deal with