Function are not workin

Please note below and solve it
1. Size button Not Showing ( check at https://abstore.in/products/indo-western-multi-printed/)

2. Color Swatches Not showing
3. Rs is showing instead of Rs.
4. Not going beyond “Add to Cart”
5. Rent Option plugin is disabled by this plugin
6. Want to rent is to be converted to “Button”- How can I do

Please solve all above otherwise this plugin will not be useful for me..