Hi Lynn , sorry to hear that the repointing work you had done is completely inadequate. When re-pointing brickwork, the old mortar has to be removed at a depth of at least 15 mm and you must use the correct mixture of sand and cement with the correct additives. Also when you mix up the sand and cement, it’s done in a small quantity , never more than an average size bucket at a time. The reason for this is if you mix up too much and use it it will start to crumble and go off.. you only mix it as you need it. It also has to be gauged correctly as in 3 sand to 1 cement . If you are re-pointing a listed or an old building, you may be required to use lime , in order to keep up with The building regulations. Hope this is helpful for you, regards Daniel, active roofing and building.