I have reminded him many times.

Remind him in writing and try get a written response. If he admits then you can go to smal claims court. If he ignores you, see if you can get copies magazines etc he subscribed in his name at the address where he owes electricity. Keep on hounding him by mail regariding the money he owes. If he is a rotten cad and continues to ignore you write it off as a bad loss.