******* I want my full money

I bought a baby chair for R719 and walking ring for R506. To my surprise they canceled the walking ring and credited me an incorrect amount instead of R506 that was for the walking ring they credited me R426. What happend to my other money. I want my full refund back 506 or 1225 that I paid for both items and they must not ship the products. What am I going to do with one item if I needed two. On top of it all I now need to pay for delivery. This is a total *******