had a round for 6 months , built it up myself, all going ok only 1 problem i have 1 guy whose windows i have done for 1 month, I ,ve called back for payment and he,s not in called back twice more, still not in, saw him this morning and he said he was sorry but he has the money and to call round, I called this morning and yet again not in , do i persist or just rub him off my round, all other customers are good payers