Price increase - but a difficult situation

Please advise what you would do?

I am aware that my price structure for nail extensions / maintainance is too cheap.

I have 10 years experience but have worked self employed for 3 years.

I charge £20 for shellac application
£25 for a full set of extension and £20 for Infills.
My full sets and Infills I include shellac application (as I prefer this to coloured acrylic for the simple reason of being easier to change colour)

My problem is that my shellac on natural nails and Infills with...

Price increase - but a difficult situation