Bajaj Finance — emi card blocked after 5 years

Address:	Thane, Maharashtra, 401107
Website:	Bajaj finserve

My emi card was blocked after 5 years of holding the card making payments on time and also maintaining a good track record for payments
I want to get a new phone and as of now i am unable to get because they have blocked my card. When i complained they stated my credit score is bad
In 5 years they haven't checked my score after buying appliances and mobile phone from them.