App is a scam – Guitar : Play & Learn Chords Review

I signed up for the free trail and now my card is being charged. The option to cancel the payments can not be found anywhere. I emailed coach guitar several times, with no response. If you want to waste your money get this app. This is the worst guitar tutorial app I’ve ever seen and I’ve tried out many. Can anyone help me fix this problem?
Review by angry customer (worst app) on Guitar : Play & Learn Chords.