Hello, my name is Ben and it is my pleasure to assist you with your question today. For now please let me know how long you worked there.
Whilst it is true that there is a time limit of 3 months to make a claim for unpaid wages, this only applies if you were claiming in the employment tribunal. However, that is not the only option available to you and you can also pursue this via the small claims court, where the time limit to claim is 6 years. So you are still in time to make a claim if you wanted to and can make it quite easily online by going to www.moneyclaim.gov.uk.
I must advice that you are unlikely to be able to claim for anything apart from the money that you are actually owed. So compensation for anxiety, stress, inconvenience, etc resulting from all of this will not be available unfortunately - just the money you are actually owed plus any interest on top.
I would be grateful if you could please take a second to leave a positive rating - your question will not close and I can continue providing further advice if necessary. Thank you