double payment made in Mars

Hello!

I have paid twice in March, on 04th and on 23th. I tried to double check it on MyNos, but my account wouldn't allow it. I also tried to call to Nos twice yesterday but received a automatic answer to call them between 9 and 10 p.m. which didn't sound right ?As I cannot physically go to the store, I am running out of options here.

I would really appreciate if someone could assist me please🙏

Jani