Is there a way to get rid of very tanned skin other than using sunscreen with high SPF?

no, you need to stay out of the sun, use sunscreen, and helio care daily (see link to emeragecosmetics.com where we do free skincare consults daily).  you can do at home peels like enlighten and cosmelan to help the skin of your face,neck and chest.  IV glutathione may also help.  Best, Dr. Emer.

IV therapy is a procedure where a concoction is delivered directly into the bloodstream. This allows a higher concentration of minerals and vitamins to be absorbed by the body. This concoction may contain enough concentrations of Glutathione for skin whitening. Your doctor will specifically tailor it for you.

Hello, sunscreen does not lighten your skin it just prevents further sun damage.  Now that you have found a sunscreen that works for you you should continue to protect your skin with it.  You may also want to consider wearing a large brimmed hat.  Once out of the sun or protected from the sun your skin color should gradually return to its normal shade.