Laney

On 2nd of August I received a letter from hmrc saying got a tax refund at the bottom if the letter it said its going to the claim guys limited I rung tax office they informed me iv signed a form giving them permission so trued getting intouch tried all the diffrent departments same message nobody can answer the phone right now please email did that on the 4th automatic response answer in 5 days rung action fraud made a statement rung hmrc back they said I need the ip address etc I did explain carnt get hold of them but nothing can be done payment can not be stopped what can I do