Did you ask whoever terminated you why you weren't being granted the probationary period? Did you inform that person that you believe that you were being fired because your new boss didn't like you, not beause of your performance? If not, you should.
What has the company's practice been when firing employees for performance? Do you know of employees who were given the probationary period? If you do, you could ask your employer for that opportunity and if denied, why you aren't being given the same opportunity?
I think your best option is to try to resolve the matter internally. You haven't presented information that suggests a violation of any employment laws. Whether you have a contract or implied contract issue is unclear. However, you will have a better chance in that arena if the evidence shows that your employer'slpractice in handling performance based problems have followed the handbook.
What has the company's practice been when firing employees for performance? Do you know of employees who were given the probationary period? If you do, you could ask your employer for that opportunity and if denied, why you aren't being given the same opportunity?
I think your best option is to try to resolve the matter internally. You haven't presented information that suggests a violation of any employment laws. Whether you have a contract or implied contract issue is unclear. However, you will have a better chance in that arena if the evidence shows that your employer'slpractice in handling performance based problems have followed the handbook.