It is worth trying. You can write to the financial adviser stating that the charges, and his/her commission should have been clearly disclosed to you and not hidden in small print. You should also question strongly why this particular product, rather than one with low charges, was recommended. You can also contact the financial ombudsman.
For future reference, you should look for any plan investing in stocks and shares to have charges which are clearly disclosed and which are somewhere in the region of 5% on entry plus around 1% each year.