Hi Lthom. It shoudl not be a problem regardless of how soon after you wax or otherwise remove the hair.
If you want to be even safer, wax the week before you go for the Botox injections as this schedule would not interfere at all.
As an aside, Laser Hair Removal will be cheaper for you in ...
If you refrain from wearing the helmet in the first day after the Botox treatment, there shouldn't be any effect on the Botox effectiveness or duration.
You state that you have had weekly additions to the botox number of units in the glabella. During an examination for this concern, I evaluate if the muscles are moving, not if the creases are still there! If you are not able to move the muscle then you need no more Botox for now. ...