Need some help wit VM 2.9.9b Here!

[rdcustom]

hi, all.

i need urgently some help with my shop.

the site is www.rdcustom.it

actually i run VM 2.9.9b on j3.3.3

i have the following problems:

-if i choose some variant in the product page, the price not update and if i hit "add to cart", i don't see the chosen variant in the cart and in the order
-i checked the option "accept tos on every order" but no checkbox is shown in the cart and i can complete the order without accepting
-if i hit "ask a question" in product page the link reload the page without show the module

please, help me. my shop is useless!