What has just happened and what do I do, I’m scared?

Anonymous
Less than an hour ago four white British men came running into my shop three of those four were after one man and there was a scuffle and my flower bed and some pots got damaged before two of those men dragged the one man they were after out of my shop, one of the men stayed behind and was extremely apologetic and gave me £3000 to pay for the damages he said (the damage was less than £100) and he asked if he could access the CCTV and I was scared so I let him access it and he deleted the footage. I’m shook and don’t know who these men were or what was going on but I’m worried they are going to be back. I had to close my shop early and I’m worried that I will get in trouble if I don’t inform the police but I have no evidence of what happened. I’m so shook, I don’t understand what any of this was about and who they thuggish men were, can someone please try and explain what has happened so I can calm down as I’m new to this country and don’t understand how things work?
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What if they come back though plus the man who gave me money was so polite, well dressed but also intimidating
What has just happened and what do I do, I’m scared?
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