Still No refund since 27 Feb

Asked for a refund in my account for order number ***. Was informed the refund was done on the 27th of Feb and I should wait 5 - 7 working days. It is now 11 working days or 16 days in total and still this refund has not been completed and does not reflect in my account. Spoke to your exceptionally rude service rep Tania Houston who demanded a copy of my bank statement. I refused to send this private information to her at which point the call escalated to a shouting match. Anyway, can someone kindly look into this refund issue and follow up on it?