Samsung bad service

We've bought a product from samsung and 'won' a R 4000 voucher. I've submitted the purchase before the 31st of December as they state in their terms. They said they will come back in 10 working days with the code. I received the code. Someone tried to phone me on a Saturday and said I must phone them back. I tried phoning, but couldn't get through as their working hours are from Mondays till Fridays. Nobody tried to phone me again. Then I phoned them in the week, after holding forever on the phone, the lady said the invoice was in my husband's name and i had to send his details, then i would receive another code immediately which they will send to me. I asked her to call me back as I keep phoning and holding for longer than 10min, she said NO. I still haven't received the new code and Ive phoned on the 14th of Jan. I asked her, will this affect the submission date, she said no. Today I phoned again, held for 6min, the phone got cut off. I phoned again, held for 15min, then finally got through and the gentleman said he cant hear me and i should phone back. It's starting to get ridiculous. This is poor service and someone should phone their clients back. I will not loose the voucher because of this. I did my part now Samsung should do theirs.