If you're having difficulty paying a bill, don't ignore it.
Talk to your communications provider as soon as possible. You may find they have suggestions that ease the pressure, and they may be able to help if a change in your personal circumstances is giving you money problems.
Things you may wish to ask your provider about:
Your provider is not obliged to offer you any of these things, but if you explain your circumstances to them, they should be able to help explore the options that may be available to you, and to send you any information that they publish about money advice.