Fatal error in front end and admin blank page

Hi

I did an upgrade from opencart 1.5.6.4 to 2.3.0.2 and i started to get this error

Could not load model total!

as per the bug report over here http://forum.opencart.com/viewtopic.php?f=191&t=166012 i deleted the leftover folders and now im getting this error

Fatal error: Uncaught exception 'Exception' with message 'Error: Could not load model extension/total/social_discount!'

also when i access the admin side i get only a blank page... Can someone tell me how can i fix this?

I did an upgrade from opencart 1.5.6.4 to 2.3.0.2...
everything is set..i dont need any data from my old site.. all i need is only the products and the images..
vqmod not working with admin tpl files..
Product ID missing, cant edit or delete the product..
Order edit problem..
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Error: Could not load model extension/total/social_discount!
Social Discount - Like/Follow/Tweet & Get Discount PAID, OC v.1.5.0 - 1.5.6.4:
https://www.opencart.com/index.php?rout ... on_id=7093
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need I say more ?
Ernie