Worst experience ever! (and ********** business practice)

Absolute the worst interaction I’ve had with an ‘online service / store’ I ordered and paid for a Black & Decker Steam Mop (FSMH13E10-QS) on the 15th July. On the 21 July I was advised it was ‘out-of-stock’, but will be dispatched “mid-August”. On inquiry I was advised on 18 August that the item “is back in stock and has been re-ordered and processed”. When by 1 September I was told that the item is still not available, I requested that my monies be refunded. I completed the necessary documentation (noting in their terms “ 7. All Card refunds are charged a Bank reversal fee of R2.50”) I finally received my refund on 18 September (more than 2 months after paying for the item) after a deduction of R32-52, evidently for bank charges. This is a ********** practice as it amounts to 2.5% of the price that I paid, when their terms indicate R2.50. [On further follow up I was responded to tersely as follows: "I profusely apologies for the inconvenience cause as it was a typographical error and should have been 2.5%".] I would not recommend anyone to buy from these people. they take your money when you place your order and when they can’t source the item and you request a refund (it takes forever), you get cheated in this manner.