Pension credits

Hi,

I'm posting this on behalf of a neighbour. She has noticed the pension credits have been stopped but hasn't received a letter notifying her of a change of circumstances. She has had a stroke, a heart condition and has just finished radiotherapy for breast cancer and is left with £90 to live off a week due to her credits being stopped.

Has anyone experienced this or has anyone got temporary problems with their credits?

Thanks in advance.