Pip

hi guys so I won my pip tribunal and someone called me Sunday a month later to ask if I had been in hospital ect and was I ok with money going into account as will be over 5000 I said yes and money went In today 2124.65 we worked out in due 7000 something this was my benifits worker who worked this out why have I been under paid when lady on phone also said will be over 5000 my partner is going to ring up today has anyone had this issues before I mean 18 months of back pay for enhanced daily living and standard mobility is more than 2000 back pay I know each year the pay has been less which I worked out so 2021 pip rate worked that out which all came to 7560 something help please