Hi everyone,great forum,hope you can help............

I was give a healthy indoor lime tree about 2 yrs ago.
In my infinite wisdom I re potted it into a much bigger container. In about a week all the leaves fell off and I thought it was dead. Rather than throw it out I tried to nurse it back to health.
A year later it has a lot of leaves now but with the following problems.............
New growth was horribly deformed and twisted at the end of the leaves, however after a few months these leaves have grown to a normal shape, whilst the smaller leaves are still twisted.
Doing some research on the net I thought it was underfed so last week I gave a thorough watering with a
20-20-20 feed containing all the micronutrients supposedly .
As you can see from the pics the leaves look starved of something and the feed has not changed the colour of them as far as I can tell.
Any ideas??