Unsatisfied customer with lack of communication from business

Hi I made a reservation last year with Ngama tended safari lodge. However due to personal reasons i am bound to cancel the trip . I then send my first email on the 17th of March requesting a request and confirmation of how that process works. i followed up on the 23,24,25, 27 and lastly 28 March with no response from emails. i Then called the number on the website *** the line of the person was bad i asked them to read my email gave them my name and requested response and there is nothing... I need my refund back my fear is that time is ticking and what i'm assuming their plan is to say i made late cancellation. This is a last option i have since my emails are not answered and my calls are suddenly not going through. Once i call it says call ended without even ringing my understanding is that my number is then blocked.