Change of contract,portfolio lowered,BIS ended

My husband passed away in May,changing the contract into my name took some time and hassle.In December my blackberry stopped working,I went to Vodacom,they said I was due for an upgrade in February,only to find out my 'portfolio\ had been changed to a lower one but would be increased in February. 23 January I went to Greenacres customer care shop to see if they could changed my portfolio