Samsung Galaxy S3 Mini battery issue

Upgraded 27/7/2014 at Vodacom4u, Claremont with Lorenzo. Experienced recurrent upgrade issues with the Samsung Galaxy S3 Mini from December 2014. Phone also started switching off from August 2015. Went to Samsung at Waterfront and consultant noted that battery was swollen (date on battery 2014/06/21) and needed to be replaced. Contacted Vodacom4u on numerous occasions from Oct 2015 speaking to Kaylin, Leroy and manager, Sheila. Spoke to Sheila on 29/10/2015 and she advised me she would escalate the issue and speak to Samsung rep later that afternoon - no feedback. Sent email to Leroy 3/11/2015 attaching pic of battery. On 4/11/2015 Leroy called advising that Samsung will not replace the battery, therefore issue would be escalated to the supervisor at Vodacom Repairs. No feedback, emails sent 11/11/2015, 14/12/2015 and 22/12/2015. Also phoned and left message for Sheila to call on 16/11/2015 - no response. I've been a Vodacom client in excess of 10 years and this experience and total disregard for feedback is completely unacceptable. Hopefully now I will receive feedback.