If they have failed to comply with a SAR within 30 Calendar Days including what you have requested and they have failed to give you a valid reason for not providing said documentation.
Then IMO yes complain to the ICO that they have failed to comply within time limit and given no reason for there failure to provide XXXXXXX Documentation.
Criminal action under 1977 act would have to be brought by Local council assuming this is in E&W, under Part III, Supplemental Provisions, 6 Prosecution of offences 1977 act.
If not Sue for them damages as posted on 14/05/2019 post #3
Tricky ! If someone in this situation wanted to continue to Insure their car on a comprehensive basis they would find it difficult. Most people would want comp cover, so a car is fully covered, even though they might not be driving it,
Suggest contacting an Insurance Brokers to ask what they can arrange.
If Insurance is not available, find a storage option, so the car can be kept off the road and SORN.
Don't touch them owe me £500 since January 2019 make excuse after excuse. Seem they always have software problems sending money out. Keep saying they will call back or email nothing been chasing it now for 6 mths the phone staff always have the same banter we will chase it up and get back to you then nothing!