Twisted line on a spinning reel can be easily fixed! Take your rod and reel outside, take any lures, hooks, or weights off of the end of your line... you want just the bare end of the line. If you have somebody to help you it will be quicker, have someone take the bare end of the line and walk out in a straight line taking the line off the spool. When all line is off the spool, have the other lay the end of the line on the ground... again!... the line must be laying flat on the ground in a straight line with nothing on the end!!! Hold the reel handle in your hand as you normally would for cranking the line in, in your other hand hold the rod between the reel and the first line guide while pinching the line inbetween your thumb and forefinger to put tension on the line while you reel, then reel in all the line back onto your reelthe combination of the loose line end and the tension will make the line untwist as you reel the line in.
This can also be done in a boat while under idle power. Pay out line until your spool is bare, then "drag" the line behind the boat for a couple minutes at a faster speed... AGAIIN!... the line must be flat and straight with NOTHING on the end!
I hope this helps.