payment

I’m based in the US and the conversion rate is not accurate. Each month it gets higher and higher and whenever I check the conversion rate shows about 32$ usd. This last charge was 37$. I need a consistent number each month and feel like I’m being overcharged because Of the conversion. I checked with my cc company and they mentioned the merchant would give the charge each month. Can you please advise?

Thank you. 🙏🏻

asd