How I can cancel trial subscription?

hallo!

i canceled my subscription Yandex music plus, but it’s working because of trial period

but I’m not in my country now and cannot use app Yandex Music , I wrote to support of Yandex Music, they say me I should to cancel my subscription completely, then I can go to special link of Yandex music and change my subscription

say please, how I can cancel trial subscription?