Cancelar a cobrança no meu cartão de credito / Cancel the charge on my credit card

Olá,
Algum tempo atras eu fiz o upgrade da minha conta para o plano de $10 por mês, mas agora preciso cancelar a cobrança desse valor no meu cartão de credito.
Como faço esse procedimento?

I need to cancel the charge on my credit card.

Help me please!

Hi Fernadsadu,
Sorry to hear you are looking to cancel!
You can downgrade your LingQ account at any time from the Account page (Login - LingQ). When you downgrade your account to Free, your subscription will be canceled and your account will be downgraded to Free at the end of your current billing cycle. You can upgrade again at any time to pick up where you left off.

Thank you, Zoran
I hope to return in the future.