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| I think i was with french signal this time, i live in basel and i work in airport its very close to the french side. Salt signal here its a bit weak. for i dont have suprises in end of the month i have this contract to be sure will not be more than 99fr. But now comes this bill... | |
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So presumably the charges are for incoming calls which you received (picked up) whilst on the French network. Those calls are not included in your plan. In this case the invoice is correct.
The caller's number is not always listed on the itemised bill in these instances, hence the 'general' number +33 333.. etc you cited.
To avoid such charges you need to put the network search onto 'manual', so that the phone can't 'roam' onto foreign networks. This is vital in border regions if you do not want to be charged. Whether you can then be reached is another matter.