I got sent funds but cannot get them I got sent funds but I do not have enough space on my computer to update bitcoin core and therefore the funds will not come is there anyway to cancel the transaction.  The website I got the funds from said they cannot cancel so can I cancel.
It is difficult to cancel a Bitcoin transaction after it's been sent, and it cannot be done by the recipient, only by the sender.  If the transaction has been confirmed, cancellation becomes impossible.

However, the funds are not lost.  They will be waiting in the address until you claim them.  You can either eventually finish installing and syncing Bitcoin Core (possibly on another computer), or you can import your wallet.dat file into some other software with lower resource requirements, and you will be able to spend your funds then.