car keeps randomly calling the last no called on either mine or my wifes phones ,also going into speech control function and changing radio stations all without any input from us.
Could this be a steering wheel fault ? any suggestions please.

The clock spring's are known to play up occasionally as are the small wiring harnesses in the steering wheel, harness is only about £20.00 but there are two of them both the same item though, one for L/H switch pack and one for the R/H might be worth a try first as not to expensive, only thing is the phone controls are in the R/H switch, radio controls L/H switch. Could try and get codes read as might show something.

Cheers
Col