headliner

I have an upholstery shop replacing the headlining in my 1975 E9 3.0 CS. They have done a really shoddy job. I have sent it back to get it redone and now they advise that the front panel above the visors is falling apart and will not hold the lining material up. Is this a common issue...

Their carpet sale is ending soon and they have presented me with a great deal of 594 euros with S and H for two tone carpet and trunk liner. Since I am paying 90 euros for shipping and need a headliner, I am contemplating adding this on. We have discussed their (new) headliner before but nothing...