i won my pip oral hearing six weeks still not been paid they keep punting it back

its been six weeeks and still not got my pip i won it at court and one year back dater.... every time i ring them it just gets longer and longer they keep tellin me lies saying i will get payed and still not been payed i am at my wits with this  i suffer from mental heath and this just puts more stress on me it will be 7 weeks soon and still no pip i know they are taking long time to pay me  can any one give me advice  on this matter