Inferior workmanship from Ford the glen

About four months ago I took my wife’s Ford ecosport to Ford the Glen for a problem with the gearbox. The workshop manager had the car for three days because of battling with a “software problem” on the gearbox. They assured me the problem was resolved. This weekend starting 11 February my family and I had to drive my daughter to Upington for studying. On our way back on 14 February we got half way between Upington and Alberton, in Vryburg when the car started shuddering and went into limp mode. We immediately to the car to the local Ford dealership who were extremely helpful and they notified us that repairs or recalls dating as far back as 2014 had not been done at all. We were informed that they could only get spare parts in March and we had to either tow the car home and rent a car to get home or leave the car with them for the next four weeks until they got the parts. We’ve already had to pay for an extra night’s stay over now we have to lay out even more money that we don’t have. We have only had the the car repaired at Ford the Glen so all points back to incompetence or inferior workmanship. Who is going to pay for their incompetence and get us back home?