Free trial membership. But i may Evert month

Each time i’m on Zwift. I get a message for a free 25 km membership. After 25 km. A message pops up to accept or decline. This is annoying as i always have to click on a decision. But i’m a payd member so i do not need that free trial.
What to do you make it disappear for ever?!
TX.
Willy