I Have Pvc's For Last 3 Months,I Had Negative Nuclear

I have Pvc's for last 3 months,I had negative nuclear stress test,echo and I had life event monitor for 3 weeks and halter monitor for 24 hr that showed 1753 pvc's out of 98000 beats approx 2% ,my doctor put me on 25 and 50 mg metoprolol that did not help,now I am on verapamil 120mg. Now it's less but still have them.i completely stopped caffeine I drink one to two 8 oz decaff coffee a day. My doctor is insisting on cardiac ablation. I need your opinion. I insisted she orders cardiac MRI so I have scheduled that. But any advice from you guys would help me
Reena