How to remove #'s 0-9 and spaces

Hello guys,

Have a spreadsheet, want to automatically do a PROPER command and a SUBSTITUTE command in order to make it look "proper" first and then remove all numbers 0 to 9 and also all spaces.

so far I have

=PROPER(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(A2,"1",""),"2",""),"3",""),"4",""),"5",""),"6",""),"7",""),"8",""),"9",""),"0","")," ",""))

But it does not work, Excel says too many levels of nesting.

Any idea how i can automatically PROPER and remove all numbers and spaces? (and for future reference any particular characters besides #'s or other characters)