i try to cancel my subscription

[Silvan353734672hr3]

hello there, since 3 months I try to cancel my subscription and every time I try the notify pops up and says "I should try again later". Is there anybody out here who can tell me what I made wrong?

thank you for your time, and maybe the solution.

[Charlie.D]

Subscriptions made on iPhone or iPad must me managed/canceled via your iTunes ID Subscription settings, and Apple Support is the group to contact if you see error messages when trying to cancel.

Please see this page for more info: https://support.apple.com/en-us/HT202039