On what platform do I run campaigns for the government?

I run a digital consultancy and I’ve recently been hired by the government to run a pre-election voters awareness campaign.

Now, due to security reason and such, they won’t let us run Ads on their social media pages. And besides occasionally posting updates on whatever gig we’re currently working on, we never run Ads for clients on our own platform. Is this a problem anyone else has encountered before ? And how would you suggest I deal with it?

There’s the obvious option of creating new handles/accounts but what will I do with them after the elections; let all that newly gained followership go to waste?