Am planning an ex MRU AONE5 with the first segment MRU-JNB. Comair operate this segment only once a week. So,

1. If this day of the week is not suitable for me, can I have a surface sector on MRU-JNB as the 1st sector of my ONE ticket. (I'll buy a separate ticket on the daily SAA flight from MRU, to get to JNB.)

2. If the above is not possible, and I get MRU-JNB ticketed as the first sector, what happens in case of

a.) the route being dropped by Comair after ticketing. Will I be automatically protected on the SAA flight?

b.) flight cancellation/ long delay etc on the 1st segment
What if I have a connection to say MRU-JNB-HKG or MRU-JNB-SYD? Will they again transfer pax on the next SAA flight or wait for the next Comair flight a week later...!!??

3. Anyone know any travel agents in MRU? Or would I have to call BA/Comair in MRU?

TIA!