I need my refund back

I recently bought a gimble at FOTOFAME OCEANS Mall on the 15 and had to return the following day because the device was acting out and the guy stated that he doesn’t know how it works and if I have problem I should return & I did return because it was the only gimble he had in store and I’ve been waiting for refund since the 16 the guy is consistently lying saying the payment has been processed later he says I should take anything from the store and I don’t want anything especially after he sold me a product that he said he doesn’t know it operate the very same product with a chines manual he can’t even read too . This is not good for such a mall and this level