Extreme difficulty in just trying to change a date

Booking ref ZA ********** 5 I am trying to change the departure date on a local flight. There is no number to call, the link only takes you to the ********** email address. I sent a mail requesting the date change on Friday afternoon. Friday evening I got a response with a quote that said I needed to accept the quote by 9pm - which I did. At 11pm I received a mail to say its been sent to another department. Almost 24 hours later and still nothing? PLEASE can someone assist with this booking urgently as it involves a family emergency- hence the reason for the change?

If you book on Kulula direct at least you can change your booking hassle free - and for cheaper. I will rather pay their fees direct going forward instead of using Travelstart if this is how their customer service is.

Please sort this as a matter of urgency.

Thanks