Bad Customer Service

I went to woolworths canal walk on the 26 April to purchase some items along with that I purchased airtime. I only realized when I got home that the consultant sold me the wrong airtime instead of 50 Telkom she sold me 50 virgin mobile. I then contacted the store but kept being passed around, iv written emails to their customer service and even wrote on their facebook page, but up until today I have received no response or acknowledgement of the matter. Im upset at the fact that Woolworths prides itself on exceptional customer service, when in fact they do not care about their customers at all. Nor have they put themself in my shoes. Im truly disappointed that it had to get to this point, because even if you pull the footage of that day they will see that the consultant was totally uninterested in doing her job.