Microsoft — Trial version expired amount for subscription deducted after 3 months

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DLF centre 5th floor parliament Street New delhi

I have taken trial version of microsoft office 365 there was a condition that i can cancel anytime. At the last i have tried to cancel the subscription but in the subscription option the website has shown no active subscription exists suddenly on 21st march my account got debited with 6252 for the purchase of subscription. Even on same day when i have checked the subscription no subscription was found. I have contacted customer care after lockdown as during lockdown the numbers were not accessible they told kindly contact the bank the banks also not refunded email id [protected]@gmail.com