If possible grab a steward, if not get a senior driver that you trust to act as a witness. Approach your supervisor and explain that you do not have a hand cart. If your supervisor produces one for you problem solved. If not, inform your supervisor that you’ll be filing a grievance. Ask for help, through the Diad, from a bargaining unit member, with any package that you aren’t 100% confident you can safely move by yourself, regardless of its weight. One stop at a time and in this instance one package at a time. Between the grievance and the increased over-allowed your problem should fix itself within a day or so.