DVLA how long to wait

[andysharrock]

I sent my docs back at the begging of September with photos before during and after the build and a invoice for the kit and the purchase of the car. I had a letter 3 weeks ago asking for a invoice for the kit, photos and a receipt for the car purchase and photos with the reg plate on the car wich I returned the day after. now nothing how long should it take and can we complain to them I waiting on a letter asking for proof again