What should I do with my poor A level results?

My A levels this year were not the greatest and I acheieved a BCE when i was predicted a BBA. I wanted to go study Law LLB at my two chosen firm and insurance universities but obviously I was unsuccessful in my application. As Law is a very ambitious pathway, I have options of to either take my offer from Clearing at a local university to study the Law LLB or I can take the gap year and redo two of my A levels to try and get a better grade. However, my parents are saying to me that a gap year is not an option and that I will be left behind. With such grades like this, I know I am at fault for not working hard enough but I’m at a crossroads right now and I don’t know what to do. Any advice??