This company attempts to ring all day, will hang up on you when you answer the call, then repeat this for a number of times. When you ring the number back it says that you have missed a call from a company that works for a reputable charity and is contracted to make phone calls and that they will contact you soon. You can not leave a message. Other times you are given a error in connection  .

recivied the same call but missied it for some reason tried calling back but get disconnected hmm