The exact information requested is not held centrally by the Home Office. UKVI transparency data provides details of refusal, curtailments and removal decisions on those linked to the abuse of secure English language testing. A link to the most recent available data is provided here;
The table in SELT_02 is the closest match to the information requested.
The data was last published in February 2017 and only contains data to the last quarter (December 2016). ETS data is no longer published after this date.