Reppert Appliance & Funiture GAVE US A DEFECTIVE WASHER/DRYER SET AND REFUSES TO REFUND OUR MONEY Belle Vernon, Pennsylvania

We purchased a used LG washer/dryer set from Reppert Appliance store. From day one the washer has not worked properly. Everytime I try to wash a load of clothes it gives an error code. I contacted Reppert Appliance and they had an appliance technician come out to try to fix the problem. The appliance technician advised the washer needed a new control board. The appliance store ordered a new control board and had it replaced. It worked for a few washes then the error codes came back. I havent been able to do laundry now for weeks and I have two little children at home. I contacted the appliance store to ask for them to take the washer/dryer set back and give us a refund of our money. The lady advised before they would refund us they would like to try to repair and replace the washer first so I gave them another chance. They brought another washer (which is the same one I was already having issues with) but this time the washer was covered in mold. It has a very disgusting smell to it and inside the washer drum/rubber ring there is build up and mold. How am I suppose to wash my families clothes in this washer? I had my fiance contact the appliance store to advise this is completely unacceptable and at this point we are demanding a refund of our money. Everytime we call the lady tells us we need to speak with the owner but never receive a return call from him. I recommend never purchasing anything from this store as they are a complete rip-off. They only want your money and that's it!!!!!!!!!