Horrible service from SAA once again

I have booked flights way in advance on SAA with reference JEZE85. I get a call today saying that the return flight is cancelled and I don't have a choice but move to an earlier flight. This is ridiculous as we have already made transport arrangements. I know have to incur more costs because SAA failed to keep up to their part of the deal. It seems every time I use SAA I have a problem. They do not try to accommodate you but just say that if i do not accept the change i can cancel the booking and use another airline. It is obvious that flights will now be expensive due to booking at short notice. They just don't give a damn. I regret ever using them.