Take You There Johannesburg - still awaiting my refund after the party bus puncture

I starting planned my sister bachelorette in October 2017, booked a Take You There party bus for 13 passengers and paid the deposit to secure my booking on the 30 October 2017. The bachelorette was taking place on 21 April 2018. In the week before the bachelorette, 16 April 2018, paid the remaining amount, sent an email with the proof of payment, confirmed itinerary and contact details. On the night of the bachelorette, 21 April 2018, the party bus did not arrive at the scheduled departure time, when we finally got ahold of someone - we were told the driver is running late and were given his number to contact him. When we called the driver , he said that he was stuck in traffic and would be at our pick up location in 30mins . An hour passed and when we called the driver again - he said he has a puncture and will not be coming to pick us up. We were already running over an hour late on our schedule , missed the booking and time allocated to our 1st stop, We then Booked an Uber and tried to continue in good spirits with the rest of our evening. The next morning I received an email from Take You There advising that they are sincerely apologetic and asking for my banking details as they will be issuing a full refund for my booking. I responded with the requested information and still now almost 3 weeks in, after numerous emails, attempted phone calls ( they never answer the calls - it always goes to voicemail). Which seem to be screened as they returned my call the 1st time assuring me that the refund should have been paid and will do a follow up with the accounts dept. I have not heard back since despite the voicemails left, follow up emails. So 3 weeks later I am still waiting for my refund!! My bachelorette night planned which revolves around the party bus was completely ruined and the lack of service post the night to refund my payment has been pathetic. I expected more from a company which seemed to be reputable. Never again will I or any of the 12 ladies who were disappointed that evening make use of Take You There services especially with this post service treatment that has been experienced.