On orders sent to Saudi Arabia, return or exchange shipping is your responsibility, except when the item has a factory defect or was damaged on the way. According to the FAQ page, when shipping a return would cost more than the item is worth, they can refuse it or suggest a different solution.
Before returning, make sure the product is still in original condition, that the receipt is at hand and that the deadline hasn’t passed. Then email the returns address listed in the terms, gsuae_cs@almana.com, which differs from the general customer service address gsuae_cs@gosportme.com. The parcel may take between 3 and 7 business days to arrive. Refunds go back to the payment method you used; processing takes up to 5 business days after they receive the item, and the money appears in your account in 5 to 21 days. You get shipping costs back only for a factory defect or damage in delivery.
Source: Go Sport Saudi Arabia: terms and conditions (cost of returns)