if your using a site that requires a landline to contact while using a uk cc, https://russiancarders.se/ is a great site to use for these needs. i have used it for a while now and has never let me down.
I dont have to tell you not to use your real phone or number to accept the phone calls, go out and invest in a shitty unlocked phone and get yourself a virgin or orange sim card as they come already use able without having to top up or reg, just put ur sim in and take note of the number of the sim holder or on a sms they send you when you load in your sim. once you have finished with that number just get rid of and do the same again for when you need it.
I dont have to tell you not to use your real phone or number to accept the phone calls, go out and invest in a shitty unlocked phone and get yourself a virgin or orange sim card as they come already use able without having to top up or reg, just put ur sim in and take note of the number of the sim holder or on a sms they send you when you load in your sim. once you have finished with that number just get rid of and do the same again for when you need it.