PrestaShop Marketing with Google problem with Products verified by Prestashop before sent to Google

[Sephton19661]

Hi All 

I have a problem with the above i have a website retroprintsonline.co.uk, This site was on a old prestashop version 7 and i could not update this. I decided to delete the old prestashop and changed my hosting at the same time. Hosting is now on cloud based hosting i downloaded the new prestashop 8.2 and have started to build my site i am at the stage where i am adding my products for sale. I have 117 products listed so far but prestashop is picking up 4100 my selected products from the product feed it looks like it's picking up products from my old site.

Is there anyway of deleting these products from the feed and only have the 117 products that i have listed so far. I have deleted my data source from Google merchant center and no products are showing on Merchant Center. i'm afraid at the next synchronisation they will all appear again on my feed.

Any help would be appreciated

Thanks in advance 

Martin