No response from Vumatel on cable laying damage

Vumatel installed Fibre lines in our neighbourhood last year.

Vumatel dug up our paving in two different places. After they relayed the paving, the paving has started sagging in both areas and is becoming a problem. I have dealt with many people at Vumatel with regard to this issue. The staff are very reluctant to give there names or a reference number etc. A salesperson call me in November last year to try and sell me their product. I told them they can call me when they are ready to fix my paving. The salesperson said that there is a note on their system and they will be there within 2 weeks to fix paving. Well, it's a new year and over 2 MONTHS later and absolutely no sign or contact from Vumatel again.

This paving is in our driveway. Is Vumatel going to pay damage to vehicles? Difference in house price when sold?

Vumatel needs to fix our paving now...It is 6 month later.