still waiting

i applied for carers allowance on 3rd July to care for my dad. I have rang a few times and they have not processed the claim yet. However my dad has received numerous letters one from the pension credit saying that they are stopping his pension premium. one from the council saying that he has been over paid housing benefit by 18.00 and now has to pay 5.73 a week towards his rent of £75.00 amd and £10 a month towards his council tax. He received a letter today saying that he has been over paid tax credits by £400. Yet I have not received a thing. Any advice please thanks x