Air Mauritius - Terrible Service causing us financial loss

We were booked on a flight to return from Mauritius to Cape Town on 31 March 16h15, after keeping is for hours on the airport uninformed with what is going on we were told that the flight was cancelled. They took our details to inform us of our new flights and our accommodation voucher - I have a photo proving what we gave them. The never informed us or gave updates of the new flight, and they new where we were staying and we gave them our email address where they can contact us. I had to contact my Travel Agent in Cape Town to help us to find out when our new flight would be. I started to email them on 8 April 2019 to ask them when they will refund us for accommodation - I tried various email address, what I did got is an email that the flight was indeed cancelled and an email which was recalled??? A lovely holiday turned out in frustration - all I want is a refund!