Hey @Dominiclam1980! Philippe here. Welcome to the community.
I'll be happy to help you out with your call quality. I'll need to ask you a few questions to help me do that.
1. Do you only have a call quality problem when making international calls?
2. Have you tried to restart your device?
3. Is your device OS up-to-date?
4. What kind of device are you using?
5. When did this start?
Let us know!