Cancellation of flights and refund of money.

We have booked our flight to France in December 2019 and due to the Covid-19, Emirates airlines cancell our flight which leave Travelstart to give us our money back. Since March 2020 we are corresponding with them to pay our money back which did not happen. When we ask to re-book flights for December 2020 they say we have to pay in R13 000.00 per person as it is high season. The money we paid was during December in their high season. Travelstart is not treating us fairly, take our money and is dishonest in their way of dealing with clients as Emirates confirmed that there should not be an additional amount to be paid when moving the flights to a later date. I want my money back ASAP. They do not answer their phones because of the Covid-19. When leaving messages on their website it takes two weeks to come back to us with an answer. They do not care about their customers, only the money and the commission they making on customers.