You have several choices.
One of them is getting the car to run somewhat normal with a chip that at the very least is doubtful. 20 miles with this chip could be too much. Without equipment and tools that will be difficult.
You can try to get a car trailer and transport the car on that (beg/borrow/steal).
You could also put back the original injectors, 2-bar map-sensor and eprom. That is the safest thing to do. Leave the actuator, but disconnect the electrical wires to the amal valve and drive carefully to avoid high boosts. Then at the tuner's location swap the injectors and map-sensor.