Poor after sales service delivery

I ordered the 5g unlimited page from them although I've got a unlimited 4g with them already. They then topped up my 4g send me 2 phone 4g sim card which is still not working since 27 march .after numerous calls they made a mistake and sended me the 101 on the 3 of april 24 after numerous cal till today I've whent and fetched the router to save some time.still till today a dont have any signal and no seems to know that i received or what needs to be done