terrified PIP RV Dec want me to phone now

Please help my anxiety, breathlessness is getting worse since I got a letter weeks ago asking me to phone them regarding review due in December 2020. I have not been able to sleep, dislodging my CPAP, breathess and anxious +++++ diabetic and long covid and more. What can I expect? Terrified of phone interrorgation. Help please

A friend phoned with me this morning.
directed to another number. Then told I need to reapply!
Form "should" be sent to me in 2 weeks.
Now worried about that! Going through all that again. And because I couldnt face upto calling (letter dated 08 sept) I have lost time to prepare to do the whole form all over again.
I had a mental breakdown 2 years ago as it went to tribunal. It seems so much has changed.
I dont know how I will manage a telephone assessment as my breathing is so poor, its difficult to talk and breath if you get what I mean! Already feeling exasperated and fearful.

Hi
my partner took time off work and phoned.with me. And was directed to New Claims.
They took address, did not ask to speak to me, said they would send a form.
They DID NOT send form. I plucked up courage to phone today, I was excessively breathless, barley able to talk. First the woman said I need to ask a series of questions before she is able to send a form. It became clear I couldnt, speak well due to difficulty breathing. She said well phone back with a friend then. I just broke down had to take inhalers before able to continue.

I asked for a reference number, her name, She stated no reference number, and that no record would be made of my call. Again I was struggling so much to breath, and how was i supposed to cope with process. This call took 17 minutes! Eventually she asked me to wait while she went off, on return she agreed to just take my name and address, and slowly I did.
Woman agreed to post form! But its anyones guess. I honestly dont know how I am possibly going to cope all before 14 December. Let alone cope with a telephone assessment. Seems to me they are deliberately making it difficult to even get the form for review/re application.
Have you had any reports of such difficulty getting form.
Whats level information needed to review aka new application?
How can people with breathing difficulties possibly cope with telephone assessment?
My award was granted at a tribunal 2years ago things have got worse. But I have less people involved in my care, COVID being a big reason.
My anxiety, depression, got so bad last time I planned to end my life. Now this, I really dont know if I can do this again, and with limitations of covid, making getting medical appointments/evidence can be more difficult? Help please!