From what I gathered Capita were contracted by the HO to chase overstayers.. My date of curtailment was the 30th of July and I left on the 5th of September

In July 2016 i overstayed my visa because my course had finished early and had not received any communication from HO or my college that my visa had been curtailed only knew of it after Capita called me. I made arrangements to leave, but i could only leave 35 days (September 2016) after the call ...