I called back number (02) 8074 5602 spoke to a woman who said company name is Studio 504.

hi Nguyen thi, (not my name) its Elizabeth from Studio 504, than you for voting for Tam phan in our voting competition. CONGRATS! you are one of the lucky people who have won a $600 GIFT CARD to spend at Studio 504 for voting. I've got it ready for you so please SMS me back "YES" today and I'LL send it straight to your phone. Hurry, i dont want you to miss out :) Any questions? Call me on 028074602

Hi Brad, It's Elizabeth from Studio 504, I wasn't sure if you received our previous message regarding your prize for voting for Bec VanDerKolk, an $800 GIFT CARD to spend at Studio 504. I've got it here and I need to email it to you so please SMS me back "YES" and I'll send it to you to brad_smith @ hotmail.com, last chance. Cheers :) Any questions? Call me on (02) 8074 5602