Under Insurance

i have been with absa for 4 years and always have problems with claims and payouts. they increased my premium by R750 and I have never complained about it but when I have a claim I always get short changed. I had insured a device with them and sent them the invoice, they were supposed to update their records but yet they insist for me to tell them to do this and they under insure your goods. the difference in claim value is R1000 and my premium went up by R750 now I will cancel this insurance and they loose R2450 a month not me anymore.