Problem with pricing and variations on woocommerce

hello, we have something weird on our website.. we have products with many variations and usually it shows on the product page and the category page the range between the smallest price and the biggest price.
we have to raise prices but it shows old price but when you select the variation it shows the right updated price

and sometimes it shows one price although it has variations !!
and sometimes it looks right on the french side but not in English!!!

can anyone fix this
please read carefully and check attached