We (Air Gateway) have our start time changed lately on average 3 times a week (via text message) usually due to heavy amazon. They rarely tell us our start time until the end of the shift, in which half are already gone few are still working and others are clocking out. What's the rule on start time changes besides 24 hours. If they don't give us a start time day before but text us 3 hours before sort what time do we go in? PS we don't have a union steward in our building.