Good customer service is expensive.
Good customer service is less expensive than bad customer service. A smaller call center staffed with decently trained and compensated CSRs is far more cost effective than watching the headcount continuously grow and churn to deal with the increased call volume due to poorly trained staff dumping calls, permaholds, supervisor escalations, previous callers figuring out they've been lied to, etc. At some point, your call center will outgrow its allotted space, and then you'll have to deal with a costly move or additional locations. Both companies I worked for experienced this, one of them had to move TWICE in 4 years, and the cost was mindblowing. Then, as you lose a lot of your customers, there's the cost of downsizing.. all of which could have been avoided by just properly hiring, training, and compensating a solid, core group of people to take care of your customers and make sure they didn't become unhappy with the thought of giving you their money.