Price mismatch between product page and cart with Giveaway plugin

Hi,

We are using the CURCY Multi Currency plugin along with the Giveaway for WooCommerce plugin.

We are facing the following issues:

On the product detail page, the predefined buttons (tiered pricing) are not updating correctly when switching currencies — the currency symbol changes, but the underlying values remain the same as the base/default currency (GBP).

When adding to cart, the price changes within the same currency (for example: the product page shows $0.78 but in the cart it becomes $1.02).

This issue occurs specifically with custom per-ticket pricing used by the Giveaway for WooCommerce plugin.

Could you please guide:

1.How can we ensure pricing is correctly updated for predefined buttons or tiered pricing structures?
2.How can we maintain consistent pricing between product page → cart → checkout without mismatch?
3.Are there any hooks or settings required to ensure compatibility with custom pricing plugins like Giveaway for WooCommerce?

Looking forward to your guidance.

Thanks