Byus — Cancelation of my subscription

I continously mailing and calling to byus department for the cancelation. They alway said we arranging the call but no call arranged no cancelation procedure done till date .my son arrush not taking any interest into it even.no proper supervision was present waste of money and time. The customer care exceutive are yo harsh and arrogant. No senior manager can talk to meabout my cancelation and refund. I paid 65, 000 for this course for 4 four .but in the month I mail for cancelation but the exceutive assured me
To taking care of the education and return18000 and course converted into 2 year . But their didn't follow his word . No action to be taken .I pay the huge amount. Why should I bear the unnecessary suffering.so plz cancel and refund