Me and my wife ordered here previously, the chips were massively oversalted, (Yes I asked for salt and vinegar, but I didn't say I wanted the chips as an accompaniment.
The chips were really soggy which means they were cooked massively in advance, you need to teach your staff portion control, I understand pre blanching them which is fine, which will improve the chips taste giving them a fluffier yet crisp outside.. but then all you need to do is re-fry them as you said below for 75 seconds.. (Which is better than serving your customers inadequate food.)
We were also waiting for the meal for about 20 minutes while the place was rather empty, unacceptable service, unacceptable quality, I don't understand how you have received 4.3* overall.
If we were not already at home (10 minute walk before you blame this) we would have complained about this while there.