Try different companies for a quote and then contact RAC and see if they are willing to match or better these quotes, i would resume they would rather than lose you.
Tick the boxes below and see what it would cost you to have the same as you have now?
https://www.theaa.com/breakdown-cover/uk
https://www.rac.co.uk/
https://www.greenflag.com/breakdown-...B&gclsrc=aw.ds