Norton review: refund of annual subscription

I had clearly marked "OFF" for the annual renewal option of my subscription to Norton Security Premium.

Despite that my credit card was charged $144.99 on the 13th March 2020.

I have been trying to request a refund since 13th March 2020.
It is impossible to contact Norton by email, chat, their help portal or customer support.
The refund has to be requested within 30 days of the invoice.

There is generic message that the staff numbers are down due to the Corona Virus lockdown, which is false as the corona lockdown was not in force until 20th March 2020.
If any one can help it would be appreciated. Thank you.