Over charge (pay more than what the tag show)

My daughter purchase a R99.00 belt on Wednesday the 25th of August 2021. The charged her at the till R130.00 and she paid for her bank card. We send an e-mail asking for the refund the same time we discover the over charge at home with pictures of the tag and the slip. Friday a forward the mail again and before 8 this morning I mailed it again. There is not many options on the website except for ordering online. R31 seem like nothing, but for a child account it is a lot of money that cant be waist or over charged. It is also not cost effective to drive there and know the big companies can do a EFT on there site. Definitely not going to support Foschini, because it seems like there is no after service from there site either on customer queries and or complaints.