Bad service and Bad attitude!!

My sister Nondumiso Khumalo bought a stove at Best electric Ermelo branch, they took time to deliver the stove, when they finally delivered on the 2nd November 2020 they delivered a wrong stove, we requested they collect the stove and refund the money. We have been calling daily, even today we contacted them Ndumiso spoke to Nelly who advised that She is not sure of when they will collect the stove , she will speak to her manager, its shocking that till today they haven’t told the manager. I tried calling their head office in capetown, the lady at the reception is not customer friendly she kept on transferring my call to the operation machine which advised i leave a message, when i kept on calling she opted to just keep quiet and transfer the calls. Please assist we need them to collected the stove and refund Ndumiso with her Funds