Be VERY careful with supplementing calcium on a growing dog - it can be absolutely detrimental to have high doses of calcium while joints/bones are growing. What are you feeding? Kibble? Which brand? Raw? What protein sources?
You MIGHT have a chance of getting it to stand, as you said that once you removed the tape it was standing but soft. I would continue to tape for 3 months, with tape 4 days on, 1 day off. If the ear is still not standing, it most likely will never. But you might get it strong enough to stand up, but it may still be a little soft and may never be perfect.