Your question has two parts. First, the $500 fine is a civil issue that H&M seeks to pay for time an expense involved in dealing with the incident. You can attempt to settle or negotiate with them, but in the end that is unlikely. Secondly, the fact that you were not arrested does not necessarily mean you will not be prosecuted. It is best to consult a lawyer early rather than wait until charges are filed.
You can file a Civil Harassment Restraining Order against the person. A court will likely issue a Temporary Restraining Order, however, that will last only 10 days, at which time a hearing will be scheduled to determine if it should be converted into a Permanent Restraining Order. If you intend to pursue a Permanent Restraining Order, you will need to prove to a judge that the harassment is serious and ongoing. I would suggest consulting with an attorney about this to explore possible options...
It depends on the types of charges that could be filed against you. If the charges are going to be misdemeanor theft, charges must be filed within 1 year. However, if the offense is felony level theft, the time frame is longer, possibly as much as four years. It would be a good idea to contact an attorney ASAP to discuss this in more detail.
As attorney Schaeffer indicated, without a witness to the alleged violation, you have a strong defense. If you are concerned about the potential punishments for this citation, it would be a good idea to contact an attorney to discuss the situation in more detail.
Do not worry about expungement. Let the license suspension terminate in 6 months. An infraction is the same thing as a traffic ticket. It does not go on your criminal record. You probably don't need a lawyer for this. But I you want more specific answers or someone to look at th paperwork you have and possibly give a more certain answer, contact an attorney that has free consultations.
If you did nothing to violate your probation, you have nothing to worry about. However, if the probation department seems to think that you did violate probation in some way, and have some evidence to back it up, you may be arrested.
If your recollection as to the deferred sentence, meaning, the proceedings were continued without a guilty plea being entered and sentencing being pronounced, if your case gets dismissed the only record should be that of your arrest. You will not have a "conviction" on your record. Only a very extensive background check would reveal a record of your arrest, however, most employers do not conduct such in-depth background checks.