Links have broken somehow

Hello world

My website: http://www.learnandspeakenglish.co.uk

After trying to install a couple of plugins to try and create a ‘shop’ in Prices section I found that clicking on the 6 links in my Prices section just took me back to my home page (instead of product details)…

So I deactivated and deleted the plugins – but I was left with the same problem. Aaaarrrgggghhhh!

I contacted my provided who said this:

I was able to recreate the issue on my end and I tried to resolve it but to no avail. During my investigation I have deactivated most of the recently installed, activated and updated plugins, upgraded and downgraded the PHP version, flushed the server cache and looked in our server records and I was not able to find any server side which may lead to the issue at hand. All changes made on your site on my end are now reverted.

So even after all of that, I STILL have the problem 🙁 🙁

They suggested I ask the WordPress community, so here I am…

Please help !! There is a free online conversation lesson to whoever helps me solve it ! 🙂