Refund

I have sent 4 emails since February . No one is getting back to me regarding my refund. Mango had a 30kg luggage special for cpt to pe travellers (Dec and Jan) . This was all over their social media pages. a staff member at cape town international airport said the special is for business class travellers. Mango is not running a special . But business class travellers have always been allowed 30kg luggage free....had to pay R855 for my luggage. This is their response when sent them a written enquiry after paying for my luggage....<br> Dear Valued Guest I would like to apologize for the delay in responding to your email. Kindly call us on ***, we will assist you. We are not fami**** with the special of 30 kg luggage free. With Kind Regards Siyamthanda ___<br> Decided to copyand paste the 30kg special from their social media pages on the email. suddenly they were fami**** with the special .I sent a proof of payment and voucher. No one has responded since February. Can Mango airline refund me for the excess paid on the luggage.