Hello,
Do you have the 4 eligible flights? If so, you might want to look at this guide to moving between tiers:
https://www.flyertalk.com/forum/brit...iers-baec.html

It usually takes a couple of days before everything synchronizes, sometimes sooner. You might try refreshing the app.
See also, these threads:
https://www.flyertalk.com/forum/brit...ld-status.html
https://www.flyertalk.com/forum/brit...ew-status.html
https://www.flyertalk.com/forum/brit...ot-silver.html