regular price updating issue

Hi guys, I have massively uploaded products to my website using WP ALL IMPORT Plugin and CSV file, but when finished I realised that prices are inluding 6,30€ more this is because I had uploaded the wrong column. next I tried to update the prices using the same plugin and CSV where I fixed all the prices. the prices are correctly updated on the back end (regular price = 3,15€) but the price that the costumer see is different (Price shown = 9,45€).

I have tried updating all my plugins and Woocommerce Database and deleting the caché files, I tried opening the page on other computers, but there is no way to fix it.
I have the taxes and shipping costs well done because I stills work fine for my prodcuts that ar not uploaded with the CSV file.

I tried to modify stock by using the same technique and works but not the prices.

The only thing worked for me is when I add a sales price and update then The two prices are shown well. next I delete the sales price and update then the regular price and front end price does match.

The problem is that I have more than 7000 products. I can’t fix it one by one.

Any help please ? thank you in advace

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