Wisdom Jobs — refund amount not received yet

I have cancelled my trial subscription but still charged with premium services. I placed a complaint on 25th April'19 . I receive a call and mail asking for my bank details and stating that the amount will be refunded. But it's been more than 12 days nor the amount is refunded nor I got any update on it when ever I call, there are excuses like office is shifted recently, it's lunch break, the concerned person will get back to you in half an hour etc. It's very unprofessional behaviour.