Delaying PIP process

Hi

I have just got the letter asking me to move from DLA to PIP and need to delay the process.

I am going in for a major Operation on the 6th August and will be in hospital for about a week and need quite a bit of recovery time after. I’m not got going to be in any fit state to fill out a lengthy PIP form and will not be able to get out the house for 6 weeks to the advocacy group that usually help me with the form. I can’t write the forms myself.

Do I just simply ring them and ask or is there another way. I only need about a month six/weeks delay. I am so scared, the timing couldn’t be worse. I am now worried sick about the op and worried sick about the PIP claim. The stress is causing me to have more seizures which I do not need before the op.