What to do if our company is paying me salary and no overtime but work us way over 8 hours a day?

The issue is whether you are in fact paid on on a salary basis and also exempt from overtime. If  you are paid on an salary, as opposed to hourly, basis, you may be exempt from overtime. However, to be exempt, it's not enough to be paid on a salary basis: your job duties or responsibilities must also meet one or more of the tests for overtime exemption. You can find these tests at the U.S. Department of Labor's website; you should look them up and apply them to your job. The main tests to consider are the administrative employee exemption, the executive (which should be called the managerial) employee exemption, and the professional (learned, creative, and computer) employee exemtions; there are also some exemptions related to sales (not marketing) staff. If you are paid a salary and meet one or more of the tests, then you can be made to work any number of hours without overtime or additional compensation.

But, if you are either actually paid on an hourly basis or you are paid a salary but do not meet a test for exemption, you must be paid overtime when applicable (e.g. working more than 40 hours a week; working more than 8 hours a day, in California). If that's the case, you could either contact the state department of labor to file a complaint, or speak with an employment law attorney about bringing a legal action.