Customer Support with new product

Telkom sales department phoned me to sell a new deal, with ADSL with more gigs, 2 new simcards and ****le. End of February they started new service, without goods delivered. Had to phone for goods, only received incomplete delivery early March without installation. Installation promised many times after many phonically to inefficient customer call centre. Now 13 April - no set up, 2nd sim card still not delivered. Telkom seems very keen to sell a new product and very keen to start billing on it, but no follow through with delivery of service - does that not constitute breach f contract?