Online order

Good day

I recently purchased a few items from the mrp sport online store everything was payed via eft I was then told 1 week later that they didn't have stock of 2 items and If it would be ok if they give me a credit to which I agree. My items arrived at the store 2 weeks later to date 5 days later I did not still receive my credit for the out of stock items no one has got in contact with me when I go to the store to enquire the sales person told me they will phone me BT no one has to date.