It would seem that top-ups in themselves are not VAT-able but the commission on them is. This is what Subhash and Rama Varambhia discovered after a routine VAT inspection. This, of course, means the commission is lower than that advertised.
There is no room left to discuss this here, but I will be covering it in the next issue. If you want to contribute, feel free (no penalties for appearing in this column).