Unable to buy items on eBay. Will not accept my land line nbr.

[xyqst50]

When entering my details eBay will not accept my land line nbr. It locks up’7

[john1297576]

How are you entering it. For example   01 234567890 should be entered as 44 1234567890

[xyqst50]

Sent from my iPad
I am sending my land line correctly. I am also ticking land line box.