Cant turn off alarm have no control only keys

Hello, If the keys you are using are not programmed to the van, i.e. they are just flat metal end to end, the issue is likely that the battery drained on the van so now the alarm is in an active mode. You will have to get a key that is programmed to the van if you don't already have one. Secondly, the first step to diagnosing these issues is often replace the key, and you don't need to pay a technician to tell you that the key should be replaced. Start with a mobile locksmith, get a new key programmed, and see if that handles the problem. If not, you are stuck with sending it for diagnosis.