Lyca Mobile Problems

Hi has anyone had problems with Lyca? My partner has had a sim for 3 months and all of a sudden he can't receive texts.

He can send them but not receive.

Lyca have said to they are looking into it .... I won't hold my breath ... Ive done all normal things such as switch off etc even gone to the

extreme of factory resetting phone.

Anything else i can do? or any idea how to get lyca to fix asap?