Hi @iphone12, thanks for your post although I'm sorry to hear of your concerns.
You have mentioned your Oomph bundle - this is something we no longer offer unfortunately if you're going onto a new contract, and generally our SIM plans have now moved onto Volt which means an O2 SIM instead (which what sounds like you have).
Our Volt packages though do offer great benefits such as a broadband speed boost so what Oomph benefits are you worried about losing please?
Many thanks
Tom_W