Don't shop there - they fired you!!!
If they do not think you are good enough to work at Target, then you should not think your money good enough to help Target be profitable.
Why financially support a company, a store, and the management who just fired you?
If you have to buy something from Target, go to a different Target.
When I have been fired or let go from a job in the past, I have never spend one penny at that company. I have rooted for that company's demise, that store's closure, and bad things for the management. Luckily for me, two of my former employers have gone bankrupt and out of business. A third is holding on by a thread.