Trimmed my cats whiskers

I had my cats shaved by the Absolute Pets Spa in Gardens Shopping Centre. I was happy with the shave up until the point I realized that they managed to shave both my cats whiskers as well. I am absolutely disgusted because whiskers are super important to a cat and for them to be so careless as to shave a portion of it off is unacceptable. Please be weary when using their service and do a thorough check.