Poor customer service

I sent my Oppikoppi cashless card number to the SMS number provided on the card. I received an SMS in return stating that I would receive a Pin to draw my remaining cash from an ATM within the following 3 weeks. 7 weeks later, and I have not received any response, via SMS or otherwise. I tried to contact their customer support department more than once but never received a response from them either. The expiry date for these cash retrievals is 30 Nov. and I am concerned that I might not receive my money back in time.