has been repairing/ was repairing/ is repairing

[Frieda]

Hello, I am having some difficulties with this sentence and the right tense.
Is it correct to answer this question like this:

" Your phones was busy all day yesterday. Was there something wrong with is?
"Yes, a telecom engineer has been repairing it"
or should the answer be like that: Yes, a telcom engineer was repairing it.


thank you in advance

[Josef Essberger]

Yes, a telcom engineer was repairing it.

[Josef Essberger]

But there is a problem with your questionner:
"Your phones was busy all day yesterday. Was there something wrong with is?

"Your PHONE was busy all day yesterday. Was there something wrong with IT?"

[Frieda]

Ah ok. Thank you. I see that only now. Thank you.