Internet giving grey hair

Right I have had it now with Telkom, my line has been faulty since 30 December with intermittent connectivity, On 11 January a area fault came up and it was according to me repaired on the 29 February, or at least my intermittent connectivity was restored, now I am back to the start and struggling, I have decided that this is my first step to complain and not my last as this problem is costing me money, I am buying more Cell c data and this is almost triple what I normally pay Telkom. Now I received a invoice to pay from you, well I will not pay until I am satisfied with my line and you can take me to court if you want to. To top it all of you even phoned me to upgrade from a 4mbps to a 10mbps line which I did. Come on this is unacceptable!!!