Just to add some additional information:
Consider the situation from your employers point of view, where they terminated you for a "gross misconduct", which typically means they really were not happy with what you did and would prefer you to never speak to them again. There's a huge chance they just want to forget you ever existed and leave it at that. If you go reapplying to a different store, not only have you dug up what could become "old wounds", but you've also shown them that you haven't really learned anything, especially if it's even remotely close to when you were terminated.
It may seem counterintuitive, but employers (especially in related fields) do communicate with each other within regions and areas. My employer is very well aware of people that are terminated by our competition. Most companies (especially in smaller towns to mid-sized cities) talk with each other. If you work for retailer A, and they fire you, chances are retailer B already knows about it, through the grapevine of information travel within the city.
Your best bet is to not only not apply on a job with the company you were fired from, but (as I saw a related question where you ask about a CV so you're obviously looking for a new job) also apply in either a completely unrelated field (if you are in retail now you should go work for a software engineering company or something), or in an entirely different region (if you are in the United States, I'd consider at least two states away). Things like "theft" and "financial abuse" and such are very much looked down upon, and chances are that all the local retailers (if that's the field you were in) know who you are and what you did.
If you go pursuing a career with the previous employer, or with another retailer in your region, you're asking for trouble. Find a new place you fit well. I hate to be blunt, but you messed up and you're not going to fix it by pushing back against them.
A side note: I've worked for two huge retailers here in the United States (think several dozen $bn in revenue annually), and both of them had a strict "no theft" policy. If a person were terminated from any store, distribution center or even office of either company (for theft, financial violations, privacy violations, etc.) you were permanently blacklisted from the company, everywhere, within hours. One of the portions of IT companies don't skimp on is finding proper employees. My advice to you is to let it go, and forget you ever worked there.