Very unprofessional.
When Gemma was unable to properly alter a garment she body shamed and suggested using double sided tape as a fix.
If a seamstress is unable to adequately complete an alteration should they not inform you up front, not attempt it, fail, body shame and charge you for it, thereafter leaving you frantically searching for an emergency seamstress?
She may be qualified to hem pants but DO NOT entrust her with anything important!