Sold me a broken phone

3 months ago I bought a phone from Vodacom. Since day 1 I have had problems with the phone. I reported it on Hello Peter before. Network keeps on failing then I can't receive or make calls, this morning I phoned and the lady put me on hold for 17minutes after which she told me she can't find my address on the system? My battery I must charge 2 sometimes 3 times a day, when I visit the store I have to wait an hour before being assisted and even then they help others people while helping me! Must I cancel my debit order today????