Fire Fighting Supplies Can A Company Just Fire An Employee When The Process Hasnt Been Followed And How To Fight It?

Can a company just fire an employee when the process hasnt been followed and how to fight it? - fire fighting supplies

I work for a company office supplies for 6 years and this year was very difficult, because many things promised were helping me, my numbers. We wanted to without a manager for 5 months until recenlty and I write. Not Leave My old manager, as I had many questions about the company, which prevented me from achieving my goals. Major accounts were taken from me without warning, he lost a couple of choices becuse higher mismanagement. Then they told me to change things in a month or be sacked. I do not even know have a chance until the end of normal. What can I do? HR can be your worst enemy or best friend? Should I a lawyer? I do not get my due process. Thank you for comments