Lido Learning - Lido Learning No refund

I had enrolled my son for Lido learning for * years paying **, ***.
however after around *** hours, the classes did not go well and I decided to unenroll and get the refund. they promised to get the refund in ** days, but * months passed, no response from them. I tried contacting them through different channels, mail, businessperson, twitter, phone etc... only on twitter i get standard message that it will be resolved.
I have to get refund of around **, *** from them.

they have cut down all the communication channels, . Whatsapp number on their website is not working. All old whatsapp are blocked. They dont reply to mails. they have not given any phone number on website. Office address does not exist.