Orange/EE are one of the worst companies for unwanted anything. Whether it be texts, charges, or telemarketer calls, they have it all.
Customer service is lousy and their coverage isn’t great either. Furthermore, the rollout of 4G has meant they have modified their existing masts somehow and the signal quality in 2/3G is worse as a result.
Take a look at the EE forums. A lot of people complaining on there and I know for a fact that EE pays almost no attention to them because they often reward the most anti-EE people at random with vouchers and the like.
I think you’re better off with any other carrier, to be honest.