Should i resit a-levels for newcastle or go to northumbria uni

Basically I’m around halfway through my gap year and originally didn’t plan on going to uni in the UK. But recently I changed my mind and decided that retaking a-levels in May/June 2025 was a good idea so I could study in the Newcastle area (where I live) in the likes of Northumbria or Newcastle for September 2025. since my current grades were too low to do so.
However, I recently got an offer for northumbria with my old grades (CCC) so i’m curious whether it’s a good idea to go there or continue with my retakes and hope for Newcastle uni.
I’ve put the needed information about retaking into UCAS already however I still haven’t payed the fee for retaking and so have the choice to just go to Northumbria.
I will go to uni in 2025 either way, so I’m asking for some advice on whether it is worth £550 and revising a-levels to go to a “better” uni. I haven't really had the time to check them both out to see which one looks better to me.
I will be studying computer science at both unis. Thanks
This is a copy from reddit, just wanted to ask for some more people's opinions.