PLease call your vet back about this imediatley.
Besides the injections, the foal will need physical therapy by YOU and whoever goes into that stall many times a day.Ask your vet before starting this. though. I am not a vet.
You gently to gently stretch the foot towards the nromal position, just a little at a time so that no tendons get torn, pulling too hard or too suddenly can rip a tendon.
GENTLY and many times a day. Every chance you can.... Gently try to position the foot, ankle into the proper position. As the injections relax the tendons, it will get easier but this will not correct itself unless you do these exercises.
But speak with you vet first. I am not a vet but I have personal experience with this problem
I had a colt just like this and took him to a hospital but the tendon got torn due to vigorous pulling and the foal needed splinting. Ended up perfect though without a limp and perfect conformation.
Good luck,
Robin