Disa drug refusal

I was working with said company for 8 months now and never once had a drug test with them and work at 3 Plants with them and I was getting transferred to another plant and they were asking for a DISA drug test but I wasn’t aware of it until I was out of the area and couldn’t make it . now they’re saying that can be a refusal . It’s the weekend as well and they not responding so I’m wondering since it’s pre employment for that plant that I never worked at before would it be counted on my record even tho I’ve been working with them . Or since I never had a drug test with them would my job offer just get removed ?

I’m not worried about the job there’s jobs everywhere but if they put a refusal on my DISA then yea it would change things a lot