This is, I don't know, sad... If "Osclass team" products don't work right and you can't trust them, how will you buy products from other developers with confidence? Things like this are killing the Osclass market and Osclass doesn't care...
If you want, I can try to help you with the theme (but you can post it here as it's premium), contact me at patrikkos04 [at] gmail.com
Regards.