Byju's — emi stop for may... confirmed but deducted

Dear Sir,
I have taken Byju learning app service for my daughter Debdutta Ghosh on Feb 2020. As per agreement I have paid 13000 initial payment and rest of the payment with 12months EMI. First EMI 4888 got deducted on march 7 th. After that from 22 march lockdown has been started and I have requested Byju on 1 April to not to deduct EMI for Apr and May. I have called them also and they have agreed verbally. Due to critical situation I have withdrawn all the amount from my account as my parents are very aged person. But they have triggered EMI on 7 Apr. EMI bounced and Rs 590 has been deducted from my account. After that they have forced me to pay and called me 15-20 time in all my numbers registered with them. Finally 3 may they have again agreed with that they will wait till 6 Jun. They will start deducting EMI from 7 June and sent me email confirmation. I have agreed to pay interest for non payment of 2 EMI. But suddenly on 7 May again they deducted EMI. In this regard I would like to complain against Byju and refund my money back and would not continue any relationship with them. I will return back the things given by Byju. As of now I have given 13000 + 4888*2. Along with I need EMI bounce charges. Also note that from march end to 4 may they have block the tab and my daughter was unable to use it. They have unblock it on 4 may after when I have sent them that they have agreed to wait till 7 June.
I would like to request you to take necessary action on this issue and help me out.