Disgusting Customer Service

My experience with Mango has been absolutely dreadful, I had to cancel my flight after the lockdown was announced, and it's been close to 3 months with me sending emails and calling but no feedback from the regarding my voucher.....they did respond at first advising me to pick an option on what kind of voucher I wanted but ever since I picked my option, there has been no interaction with them whatsoever, I send an email almost every week but still no feedback from them. I understand the the lockdown caused alot of people to cancel their flights but come on now.....it can't take you 3 months to respond to customers.