No, I had a similar problem like many others.
The mast could be seized or the long length of toothed plastic which pushes the aerial up and pulls it down could have snapped which is more likely.
You can get a replacement mast from Toyota for about £30.
If you remove the top nut on the aerial and then switch the radio on you should be able to remove the mast with the toothed plastic which runs inside. The end of this plastic piece should be chamfered, you need to insure it all comes out
Now with the new mast feed it in (the same way the old one came out, cannot remember which way) and then switch the radio off and it should pull the aerial all the way in. Then put the nut back on.