Getting involved with online forums or social media groups devoted to visa applications can also provide helpful advice & insights from other tourists who have recently gone through the procedure. Ultimately, yall.rummyour chances of locating an open visa slot will be increased if you remain proactive and use a variety of channels. Depending on the country and kind of visa being applied for, the procedure for extending a visa slot can differ substantially. In most cases, candidates must first provide a good reason for their request for an extension, such as an unanticipated situation that kept them from their initial appointment.