Very disappointed and frustrated customer

I have bought Chest of Drawers in April and when I received it was not the size that I anticipated I returned in after a day/ two They are not processing my refund it’s more than a month everyday I’m told it has been processed and I will receive in after 5 working days same story everyday Now they are not responding to my emails or taking my calls, On the 25 May Sephora Montsho sent an email that the query has been resolved but still no money refund to my account