Dissapointing start with a new employer - Mitarbeiter (anonym) bei TTEC: Mitarbeiterbewertung

Pre-assigned work schedule does not seem to be worth anything. I signed an agreement to work 20 hours per week and was given the choice of shifts before going into production. Now I get a new schedule up to 2 times a week which requires me start my shift earlier than agreed plus I have to work more hours. This is inconvenient and leaves me feeling cornered. I received an email one day telling me that their time system has logged me as late since the schedule that I had the day before changed and I should have been in production 20 minutes before. I get the message while I am still en route from my day job.