My vouchers

Hi in December I went to pavilion an purchased a washing machine, fridge, dishwasher and a stove. I have purchased these items and was told I would be getting a R4000 voucher with each item I bought. I went online filled out the forms had problems doing so so I contacted the email address provided i have explained to them I'm having problems pls could they help I have also send all relevant information, documents, proof of payment ect. I got an email back after a long time saying I will only be receiving 1 voucher not all 4, I'm so angry, hurt n disappointed to b treated like this after spending so much money in the store. Who do I report this to, how do I take this further???