FREEZING PHONE

i have upgraded my cellphone on the 1st of May and on the 8th day of an upgrade the cellphone started freezing and i returned it Vodacom whereby i was told that they cant take it back but they can take it to the technician. i raised my concern that i prematurely upgraded to another phone due to the problems the previous phone had. so i cant pay FOR a problematic cellphone for 24 months. the guy shown me a clause on the contract then i decided to take the frozen phone back. on the 1st of August the phone froze until the 3 Aug. i returned the phone and i asked for the loan phone since i do not have another phone to use and i was told that they do not offer the loan phones and there's nothing they can do. i escalated the matter to their headoffice on the 04/08/2015 REF - A1-X8DB-WFK2RB without any feedback. i called Vodacom on Friday and i was told that the feedback will be provided on Tuesday this week. To date i havent heard anything