Blocked sewage drain on my property

The main sewage drain onto my property smells awful. Been seeping sewage for about two weeks

I phoned the WB on Sat but was not seen till Tues. the WB attended job no 4659849 said it would need two vans to pump it out they would contact me which they failed to do. My neighbour's all reported smell and last night B&H washed the pavement and curb.

I explained to them that the problem had not been fixed by the WB they said they would report it back to B&H. Still no contact from WB I got up this morning and for the first time my toilet was not flushing and my drains were now also overflowing. Help what can I now do thank you