Overpayment PIP

I am facing a huge dramatic problem at the moment and I need desperate some advice please on what to do next.
I had applied for PIP around a year ago and I did go through assessment to check me out if I am indeed disabled and unable to work. I did prove that along with all my medical certificates and history and I was accepted to receive the PIP. However, 3 months ago I received a letter regarding my PIP saying that I'm not qualified anymore because I didn't satisfy the residential status. (I'm in UK since 16th of February 2013 and I did apply on 2014 for the benefit). They were supposed to let me know for this issue in order to appeal or do something but instead they kept paying me and now they are asking from me £6513.71 + £50 for civil penalty because THEY SAY that it was my fault when I was completing the form which is a lie because I wrote whatever it was supposed to be written. Anyway that letter that I did receive 3 months ago by informing me that they will stop the benefit for the above reason, was saying clearly that they are sorry for the mistake and they have to take the money back. I don't have any money, they have instructed from a debt collector to get the money. I'm disabled and not capable to work for the rest of my life. I did re apply again for the PIP a few days ago before I got that letter that they have instructed debt collector to get the money back. What can I do? I have no money, I'm poor and I'm desperate. Please help me.

Gordon

Thank you for your reply.

I will seek some advice.

I am more than 2 years in uk and I did re apply for PIP a few days ago.
I have 70% disability, certificates that proves that as sick notes from my GP as well.

I did complete my assessment face to face in order to get the PIP and I believe now that I have completed more than 112 weeks in UK I will be able to start getting paid by PIP.

What will happen if they refuse it again? I don't have any money to support myself.
My wife helps me but it's not enough for both of us.

Thank you,

Christos

Gordon

I did apply for ESA as well at the same period as I did for PIP a year ago but it was refused because I applied for ESA NI contributions which were not enough.
Now, I have applied again for ESA INCOME SUPPORT and I am waiting for the decision.

In regards of PIP, is there any chance not to be qualified again even though I meet the residential status requirements because of this overpayment?

Regards,

Christos