Here's a response that ends the conversation without arguing.
"That's fair. Your friend should use whoever works for them. My service works for me and my customers. No hard feelings either way."
British IPTV resellers who defend their prices look insecure. Those who don't engage look confident. Price is a filter. Let it filter.
Your IPTV reseller panel costs what it costs because you chose reliability over rock-bottom pricing. Not everyone values reliability. That's fine. They're not your customer.
A pricing confidence story from a reseller in Lytham. He used to justify his prices for five minutes. Now he says "no problem, use whoever works for you." His IPTV reseller conversion rate actually went up. Customers respect someone who doesn't beg. His IPTV panel serves people who value stability.
Being an IPTV reseller taught him that confidence sells. A British IPTV reseller who doesn't defend their prices looks like someone who knows their value. The IPTV panel is the same. Your posture is different.
That said, know your numbers. British IPTV reselling with clear cost breakdowns builds confidence. Your IPTV reseller panel costs X. You charge Y. The difference is your value.