If you have been using another agency to manage your Google Ads campaign, it maybe possible for us to just takeover if the account has been setup in your business name. However a lot of Google Ads agencies run campaigns in their own Google Ads accounts, so it may not be possible to take over these accounts. In this instance we would need to create a new Adwords account and campaign. We run Google Ads transparent with our client. We always register and setup Google Ads accounts under our clients business names.